Looking for Chinese reading comprehension questions and answers for the first grade of junior high school

Expository reading: Can humans move to Mars?

As early as in science fiction novels more than a century ago, humans began to walk on Mars, but until today this is just an idea. But many people firmly believe that the question is not whether humans can land on Mars, but when and how to get there. So far, no one knows exactly how to reach Mars in the most convenient and cost-effective way. Some people estimate that it would cost US$60 billion or even more to land humans on Mars. However, Robert Zubrin, chairman of the Mars Society, believes that this number should be 30 to 40 billion US dollars, equivalent to the cost of the Apollo moon landing program. Zubrin published a book called "Settling Mars", which outlines a grand blueprint for human settlement on Mars.

Why are humans always yearning for Mars? Because judging from the current observation situation, Mars is the most likely place to become mankind's second home. Although the temperature on Mars is minus 200 degrees Celsius, among all the planets in the solar system, the environment of Mars is the most similar to that of the Earth. Mars is about half the diameter of Earth, and has one-third of Earth's gravity and one percent of atmospheric concentration. Most importantly, the probe has discovered the presence of water at Mars' frozen poles and beneath the surface. Mars approaches the Earth once every two years. This summer, Mars came to a distance of 55.76 million kilometers from the Earth. This is the closest it has been to the Earth in 60,000 years.

Zublin said: "People want to know whether there is life outside the earth, and Mars may be the key to solving this problem. On Mars, even if only primitive microorganisms can be found, then It also means that life similar to humans does not only exist on Earth. "The basic question that humans want to answer is, where did humans come from," said Louis 6 Fredman, president of the Planetary Society. Where to go? "What attracts us most about Mars is that it is likely to help us understand the origin and destination of life." "Moreover, Mars is the only place we currently know where humans have the opportunity to immigrate, and humans will use this to prove that they will not stay on Earth forever. on; if we (A) can immigrate to Mars, then the Earth may (B) be our only home, and we will have to re-examine the relationship between humans and the Earth.”

Q1. Due to the editor’s question. Omission, the word "no" was missing from the underlined sentence in the text. Some people think that the word "no" should be placed at (A), while others think it should be placed at (B). Where do you think it should be placed? Why?

Q2. If one day Martians come to Earth as guests, please act as a tour guide to introduce a tourist attraction and features you know to the guests. (2 points) Answer: B. "Mars is the only place we currently know where humans have the opportunity to immigrate, and humans will use this to prove that they will not stay on Earth forever"

The Badaling Great Wall: The Badaling Great Wall in Yanqing, Beijing, is one of the preserved Great Walls of the Ming Dynasty The most complete and representative section. This is the outpost of the important pass Juyongguan, with an altitude of 1,015 meters and a dangerous terrain. It has always been a battleground for military strategists. It was an important military pass in the Ming Dynasty and an important barrier for the capital Beijing. Climbing up the Great Wall here, you can get a commanding view of the magnificent scenery of the mountains. So far, more than 300 celebrities including Richard Nixon and Margaret Thatcher have visited here.

Q2 is an open question, answer it yourself