The author has successively introduced the 4 characteristics of striped spiders

Nests, shapes, food, nets.

1. Appearance

The striped spider is the most perfect spider I know. On its chubby, hazelnut-sized body, it has yellow, black, and silver stripes, hence its name"Striped spider"。

Their eight feet wrap around their body, like the spokes of a wheel.

2. Food

It loves to eat almost any little bug. It doesn't matter if it's where locusts jump or where bees hover, where dragonflies dance or where butterflies fly. As soon as it can find a place to climb the net, it will immediately weave the net.

It often stretches its net across the banks of the creek, as the prey is more abundant in that area. Sometimes it also weaves its webs on grassy slopes or elm forests, because it is a paradise for grasshoppers.

3. Nest

The top of the nest is concave and looks like a silk bowl on top. The rest of the nest is covered with a thick and delicate layer of white satin, embellished with ribbons and some brown or black patterns.

We can immediately guess what this layer of white satin does, it is waterproof, rain or dew cannot soak it.

4. Nets

The top of the nest is concave and looks like a silk bowl on top. The rest of the nest is covered with a thick and delicate layer of white satin, embellished with ribbons and some brown or black patterns. We can immediately guess what this layer of white satin does, it is waterproof, rain or dew cannot soak it.

The advantage of using (comparing) (column numbers) to illustrate the sentence drawn in the third natural paragraph of the spider outside of class is that it allows students to understand the spider's ability most intuitively and make the most understandable description of the center depicted in the text.

The author initially had a feeling of disgust. Wherever it is, it spreads its net to catch bugs. No matter how tidy a house is, when it has cobwebs, it will be annoying and make people feel that the owner of the house is not diligent in cleaning.

The spider is a part of nature and should have the right to live, and its web is built to manage life. For the spider struggling in difficulty, "I" not only did not hurt it, but also sent it to a dry place, and "I" felt that the spider was grateful to "me".

Looking at the spider web knotted in mid-air, the gossip-shaped open, you must ask: Where does the silk of the spider's web come from? How thick is a filament? Spider silk is secreted from a protrusion at the tip of the silk sac underneath its abdomen. The silk is viscous in the abdomen.

Liquid, as soon as it comes into contact with air, instantly solidifies into viscous and elastic silk threads. Small insects are firmly stuck as soon as they touch the silk. Scientists observed under a microscope that a spider silk is about five microns in diameter, while a hair is about 80 microns in diameter.

In other words, about 16 spider strands are equivalent to one hair, do you say fine? A Japanese scientist once spent a few months collecting 200,000 pieces of spider silk and making a bundle of silk threads four millimeters thick for experiments, but he didn't expect it to be able to bear a weight of 65 kilograms, which is many times more powerful than the same thick steel wire! This shows that the spider silk is strong and not easy to break.

As a result, humans process spider silk materials into high-strength fibers, which are used to make fishing nets, parachutes, bulletproof vests, wheel tires, orthopedic surgery tools and equipment protective materials.

The striped spider catches its prey with the large web, which climbs on the branches of nearby trees. The web of the striped spider is similar to that of other species of spiders: the radial spider silk spreads from ** to all sides, and then a circle of spirals is continuously coiled on top of it, from ** to the edge.

The whole net is very large and symmetrical.

Body length 4 05 4 68. A female spider is 4 68 in length: cephalothorax 1 71 in length and 1 53 in width;The abdomen is 3 24 long and 2 07 wide.

The dorsal carapace is pale yellowish-brown with blackish-brown thin edges on both sides and a light black "V" spot between the posterior middle eye and the posterior margin of the dorsal carapace. Cervical and radial sulcus yellowish-brown. The middle fossa is longitudinal, and the front half has a "figure-eight" brown carving, and the rear end of each engraving is a small pit.

The anterior row is concave and the posterior row is slightly wider than the anterior row. Each eye has black spots. The indirect eye has a very wide scaphoid reflective pigment layer.

The anterior-medial interocular distance is slightly larger than the anterior-medial interocular distance (0 10:0 08); The posteromedial interocular distance was greater than the posterior medial interocular distance (0 13:0 08); The anterior and posterior eyes are connected.

The middle eye area is 0 35 long, 0 34 wide anteriorly, and 0 34 wide posteriorly. Anterior middle eye = anterior eye = posterior middle eye = posterior eye (0 13).

The forehead height is 0 18, which is significantly larger than the diameter of the anterior middle eye. chelicerae yellowish-brown; The anterior embankment has 3 teeth and the posterior embankment has 4 teeth. The lower lip, jaw lobes, and thorax are yellowish-brown to light brown.

The lower lip is wider than long. The anterior margin of the jaw lobes is the broadest and has a fine brown edge. Melanin is present in the chest plate.

The feet are yellowish-brown with a small number of brown coarse spines, of which the leg has 3 or 4 anterior spines and the tibia has 2 anterior spines. The end of each segment of the foot has a narrow black edge, and only the tibial and posterior tarsal segments have a wider black edge, and the tibial joint is the most obvious. The leg joint has 2 rows of 9 listening hairs, the leg joint has 2 rows of 8 listening hairs, the leg joint has 1 row of 5 listening hairs, the leg joint has 2 rows of 10 listening hairs, and the length of the leg joint listening hair row accounts for about 1 5 of the leg node length.

Step measurements: 16 65 (4 68 + 5 31 + 5 49 + 1 17), 9 94 (2 97 + 3 06 + 3 06 + 0 85), 4 89 (1 57 + 1 44 + 1 30 + 0 58), 9 04 (3 06 + 2 70 + 2 61 + 0 67). Foot Pose:

1，2，4，3。The abdomen is pale yellowish-brown and densely covered with golden-yellow scales. The anterior half of the dorsal slope is raised high, with a black spot on the midline slightly below the highest point of the anterior and posterior slopes of the uplift, and a black spot on the proximal midline.

There are 2 black spots on the left and right sides of the spinner. There is a large round black spot on the front of the ventral surface ** near the spinn. The outer female is light brown, with a large trapezoidal depression, and the front half of the depression has a slightly sloping "V" shadow on each side; The seminal vesicles have 2 chambers, the connecting canals are ossified, dark, elongated, and distorted, and the 2nd chamber is separated from the thin-walled posterior opening of the 1st chamber, with a smaller fertilization duct proximal to the 2nd chamber.

Summary. Hello, this is the total score of the segment. At the beginning of the article, although the spider's appearance is not beautiful, he has a set of skills to eliminate pests for people. At the end of the article, spiders are really powerful.

Hello, this is the total score of the segment. At the beginning of the article, although the spider's first infiltration appearance is not beautiful, he has a set of skills to eliminate pests for people. At the end of the article, the ability to stir up the spider cover is really great.

At the beginning, it is always said that the spider has the ability to eliminate harm for people, and the middle stare at the manuscript to say that this ability is concretely expressed, and at the end, it is said that the spider's ability is a big debate, which is the general structure of the total score. The beginning and the end form a beginning and end echo, the structure is complete, and the hierarchical division is clear.

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