The weather in Beijing on September 29th.

Question 1:B

Question 2: A.

Question 3:C

Test analysis:

Question 1: The atmosphere is divided into troposphere, stratosphere and

The weather in Beijing on September 29th.

Question 1:B

Question 2: A.

Question 3:C

Test analysis:

Question 1: The atmosphere is divided into troposphere, stratosphere and upper atmosphere from bottom to top. The tropospheric thickness varies at different latitudes, with an average of about 12km. The thickness of the stratosphere refers to the height from the tropopause to 50 kilometers above the ground. From the height of the satellite in question, it can be seen that the satellite is located in the upper atmosphere, which has an ionosphere and can reflect radio waves. A and D are the characteristics of the troposphere and C is the characteristics of the stratosphere, so the answer B is correct.

Question 2: There are two main ways to choose a satellite launch site. One is to choose low latitude areas, which can improve the initial speed of satellite launch; The second is to choose the mid-latitude inland area, mainly considering the good weather conditions in the mid-latitude inland area, and the answer A is correct.

Question 3: new york West Zone 5 time = Beijing time (East Zone 8 time)-time difference between the two places, new york time = September 29th 2 1: 00,16-(8+5) = "September 29th 8: 16, c is correct.