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单项选择题

Questions 26 and 27 are based on the following news. Which of the following material is NOT used to communicate with outer space life

A. Images.
B. Videos.
C. Sounds.
D. Radar.
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热门试题

单项选择题In his lifetime, Sandburg had NEVER been

A. a blacksmith.

B. a reporter.
C. a writer.

D. a biographer.

单项选择题Which of the following is NOT the reason for people to oppose year-round schooling

A. Some evidence shows that year-round schooling improves learning.
B. It is hard for families to organize activities.
C. Summer camp sponsors would find it hard to operate their business.
D. Some parents want to release the pressures of school for their children.