题目

实际划分东西半球的界线是（ ）A.任意两条相对的经线所组成的经线圈B.0°和180°经线所组成的经线圈C.西经20°和东经160°所组成的经线圈D.东经20°和西经160°所组成的经线圈 答案：【答案】C【解析】东西半球不是以0度和180度为界，为了避免一些欧洲和非洲一些国家分成两个半球，于是向西移了20°，所以东西半球以20°W和160°E所组成的经线圈为界线，0°经线是东西经线的分界线，180°经线是日期变更线，0°纬线是南北半球分界线，故选C。China successfully launched its new heavy-lift carrier rocket（重型运载火箭） Long March V at 8:43 p.m. Beijing time, on Nov. 3, 2016. It is the second launch from the Wenchang Launch Center. The rocket, which looked much “fatter” than other Long March rockets, was launched from the Wenchang Space Launch Center in south China's Hainan Province. About 30 minutes later, it was successfully sent into an orbit（轨道）about 2,000 km above the earth. The major purposes of the task are to check the design and performance of the new rocket and test the rocket's flight program. The successful launch has made China from a major player in space to a major power in space. The successful launch shows that China has become a real space power in the world. The Long March V is a large, two-stage（二级的）rocket and one of China's largest carrier rockets. Its carrying capacity is about 2.5 times that of the present Long March rockets, which is up to 25 tons. The rocket is about 57 metres long. It has eight liquid oxygen rocket engines in four boosters（助推器）, two liquid oxygen engines in the first stage and two small liquid oxygen engines in the second stage. The new rocket is of great meaning as China's space program. With the heavy-lift carrier rocket, China can send more astronauts to the space station and get prepared for exploring the moon and Mars.1.The rocket was launched from ________．A. the Jiuquan Launch Center B. the Wenchang Launch CenterC. the Taiyuan Launch Center D. the Xichang Launch Center2.China launched the rocket in order to ________．A. check the design and performance of the new rocketB. repair the rocket's flight programC. become a real space power in the worldD. explore the moon and Mars3.The underlined word “capacity” in the fourth paragraph probably means“________” in Chinese.A. 人数 B. 时间 C. 长度 D. 能力4.How long is the rocket?A. 2.5 meters. B. 25 meters. C. 57 meters. D. 100 meters.5.Where does the passage probably come from?A. A travel magazine B. A science book C. A news report D. A picture book