单选题
英语四级
2017-12-16
第17题答案________
A．They accurately calculated the speed of the orbiting shuttles.
B．They developed objects for astronauts to use in outer space.
C．They tried to meet astronauts' specific requirements.
D．They tried to make best use of the latest technology.
参考答案
B
答案解析
暂无解析
你可能感兴趣的试题
A．They are extremely accurate.
B．They are expensive to make.
C．They were first made in space.
D．They were invented in the 1970s.
A．It was when her ancestors came to America.
B．People had plenty of land to cultivate then.
C．It marked the beginning of something new.
D．Everything was natural and genuine then.
A．They believed in working for goals.
B．They enjoyed living a living a life of ease.
C．They had all kinds of entertainment.
D．They were known to be creative.