Why do myths and stories often appear in which mortals challenge the heavens?

Because such a story is more interesting, and it is impossible to give birth to the kind of plot of the rebellion of the gods in the heavenly court in the era at that time, through the mortals challenging the heavens, it can highlight people's desire for freedom at that time, as well as the psychology of not being bound and the ambition not to accept fate.

There are countless gods and demons in the Ming and Qing dynasties, which is the first and most prosperous period in the ancient history of our country, among which mortals like mortals were persecuted by the heavenly court, so they were unwilling to accept their fate, so they studied everywhere, and finally learned the stories of immeasurable magical powers to challenge the heavenly court.

Just like the story inadvertently revealed in the original Journey to the West, the Jade Emperor's sister Sifan was in the lower realm, and later matched marriage with Yang Jun and gave birth to Yang Dalang, Yang Jian and Yang Chan Three children, as a result, the Jade Emperor sent the heavenly soldiers to the lower realm, killed Yang Jian's father and eldest brother, and suppressed his sister under the peach mountain, and Yang Jian had to flee, and later wandered around to learn the arts, hoping to rescue his mother, so he finally worshiped Yuding Zhenren as the master to learn seventy-two changes and other spells, And it grants infinite physical strength.

Later, Yang Jian got the guidance of the Queen Mother of the West, so he began to "take the mountain to catch the sun" to capture all the nine suns in the sky alive, so that no one stopped him when he split the peach mountain to rescue his mother, so in the end, Yang Jian split the peach mountain to rescue his mother, and later made a big havoc in the heavenly palace and resisted the gods, so the Jade Emperor had no choice but to compromise, and crowned Yang Jian as the "Erlang Xiansheng Zhenjun" stationed at the mouth of the Guanjiang River.

Later, Yang Jian's image changed, from a person who did not admire the powerful began to become greedy for the powerful, in order to be able to get the reward of the Jade Emperor, he continued to send troops to be sent, and later pressed his sister under Huashan, and he became a judicial god and moved to the heavenly palace to live, and wanted to capture his nephew Agarwood, and finally Agarwood worshiped the Holy Buddha Sun Wukong as a master, learned immeasurable supernatural powers, and finally finally won his uncle and rescued his mother.

Because the Chinese have always believed that man will conquer the heavens, mortals can also challenge the authority of the heavenly court through their own strength.

I think this is a kind of intention that the author wants to express, that as long as mortals persevere in their efforts, they will also achieve great things, and eventually challenge the heavens. This is to let the majority of readers not feel small, and small people will be admired.

Because of such a plot, there is a sense of conflict. Mortals can challenge like the gods, and such a plot is attractive enough to arouse the reader's interest.

The answer is c

Method 1: According to gmm (r 2) 4 ( 2) mr (t 2), the following can be obtained

t＝2π√(r^3/gm)

then t is proportional to the power of 2/3 of r. Since the orbital radius of the astronaut is 7r0, the orbital radius of the synchronous satellite is 7r0, and the ratio of the two radii is 1 2, the ratio of the period is 1:2 2, and the answer can be obtained by multiplying this ratio by 24h.

Method 2: Solve directly according to Kepler's third law. (It's actually the same as above, but it's simpler!) ）

The orbital radius of low earth orbit can be regarded as the radius of the earth because it is small relative to the radius of the ground The period is calculated by gravity equal to universal induced periods, and then the number of "days" is obtained

By gravity is equal to gravitational force: mg=mr4

t=rg84 minutes and hours.

then the number of days n=24

Option B is correct, and A, C, and D are incorrect

Therefore, b

The orbital radius of low earth orbit can be regarded as the radius of the earth because it is small relative to the radius of the ground The period is calculated by gravity equal to universal induced periods, and then the number of "days" is obtained

Solution: The gravitational force by gravity is equal to the gravitational force: mg mr4 t

Get: t=4 r

g 84 minutes hours.

then the number of days n=24

Option B is correct, and A, C, and D are incorrect

Therefore, b

by gmmr

mvrmω2

r=m（2πt

r=ma solution: v=gmr

t=2πrv

rgmgmr

A=GMR analysis options.

a Since the surface g has been given, it is replaced by gold and GMMRM (2 t

r=r+h) can find the period so a is wrong.

b Since the period can be calculated, the "number of days" within 24 hours can be estimated, so b is correct.

c Since the surface g has been given, gold is substituted with gmmrmv

rr=r+h), then the velocity can be found so c is correct.

d Because the mass of the spacecraft is not known, the gravitational force cannot be calculated, so d is wrong.

Therefore, I chose: BC