How do you write question 2?

Sandbar refers to the general term of the sandy beach formed near the heart beach of the river, the heart of the river, and the lakeside and seashore.

It is an accumulation landform formed by the movement and accumulation of water currents, waves, and accumulation. The formation of a sandbar is related to the deposition of sediment carried by flowing water downstream, and the determining factors are wind and waves, which play a controlling role.

A sandbar is a deposited landform formed by the accumulation of water currents and waves. Rivers, lakes, and reservoirs are small silty islands that are flooded at high water levels and exposed at normal water levels. Shazhou is a general term for the sandy beaches formed near the heart beach, river heart island, lakeside, and seashore in the river.

Sandbar is a general term for the small surface sand texture formed in water bodies such as rivers, lakes, and oceans. It is a deposited landform formed by the accumulation of water and waves.

One, I, won't let you, no.

Most of South Africa's estuaries are unsuitable as harbors due to the blockage created by large sandbars over the years. Sandbars are formed by periodic sediments brought by waves, tides and steep slopes of most rivers in South Africa. Chongming Island is formed by the continuous sedimentation of a large amount of sediment discharged from the Yangtze River under the interaction of the river and the sea.

A large amount of sediment discharged from the Yangtze River basin is at the mouth of the Yangtze River. Chongming Island is gradually in the process of the formation and evolution of countless sandbanks.

Did. The method is as follows, please refer to it:

In terms of the arrangement of men and women, there are only two of them:

Men and women men and women men and women.

Or: Men and women Men and women Men and women.

In the first way, in the first step, the 4 boys are different, so the boys are all arranged in A4 (subscript) and 4 (superscript); The second step is to row girls, the same 4 different girls, so the girls are all lined up with A4 (subscript) and 4 (superscript) species; Multiply.

Finally, the second method is similar to the first method, so it can be simply multiplied by 2. (The results of these two categories are added, but here the two categories are the same results, multiplied by 2).

Formula: Full permutations f(n)=n!(Definition 0!)=1), e.g. 1, 2, 3, 4 The full arrangement of the three elements is:

A total of 4*3*2*1=24 species. That is, a4 (subscript) 4 (superscript) = 24

Solution: To make x-2x-3 meaningful.

x²-2x-3≥0

i.e.: (x-3)(x+1) 0

x -1 or x 3

So: when x -1 or x 3 is:

x -2x-3 makes sense.

This is a quadratic radical, that is, the number of squares to be opened vertically is greater than or equal to 0

8.Don't look at the flowers blooming late, keep your heart first. Yang Guo "Untitled" 9The face of the person does not know where to go, and the peach blossoms are still smiling in the spring breeze. Cui Hu "Title Capital City Nanzhuang" 10Three or two peach blossoms outside the bamboo, the prophet of the plumbing duck in the spring river.

x 2-2x-3 0, (x-3) (x+1) 0, x -1 or x 3

The range of values of the real number x is.

x -1 or x 3

(1) ABC is an isosceles right triangle => CAF= BCG=45°, AC=BC and ACF= CBG

ACF & GCB congruence => af=CG(2) CFB= ACF+ cab= ACF+45°= CBG+45°= CBG+ GCB= EGC

cbf=45°=∠ecg

ECG is similar to CBF, CE=AE=>CF=2EG, and ADE and CGE congruence => CF=2eg=2DE

Which second question has a title?

I made a place, every day is fragrant, Cheng Cheng Zhang is up every day.

, belongs to translation, so choose C (Martian) 8482

The common denominator is: scattered, abrupt, sprinkled all over the sky!

Shaded part +6m 8m area = 8m 7m (parallelogram, base height) = rectangle 7m 8m area.

Shaded part = area of rectangle 7m 8m - area of 6m 8m = area of trapezoidal top.