Questions 8 to 10 are based on the conversation you have just heard. Listening to the recording[音频]
A. The effect of the atmosphere on rainfall.
B. How conditions on the Earth support life.
C. How water originated on Earth.
D. A new estimate of the age of Earth.
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9.Listening to the recording
A. The surface of the ocean is expanding.
B. Volcanic activity is increasing.
C. The surface of the Earth contains tons of cosmic dust.
D. Thousands of comets are colliding with Earth’s atmosphere.
10.Listening to the recording
A. They are found under the oceans.
B. They were most active when the Earth was first formed.
C. Their emissions created Earth’s atmosphere.
D. Their fumes are mostly steam.
Questions 11 to 13 are based on the conversation you have just heard. Listening to the recording
A. Training astronauts to adapt to the extreme space.
B. Helping astronauts work in the extremes of space.
C. Designing the special clothes to protect astronauts.
D. Finding the suitable clothing material for astronauts.
12.Listening to the recording
A. It can cause severe burns.
B. It can freeze skin in a short time.
C. It can expand the gases in the body.
D. It can cause severe pains in the body.
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