十进制数101转换成二进制数是______。A) 01101001 B) 011

Having mastered the technology of manned spacecraft, China became the third country in the

world ______ manned spaceflight independently.[      ]

A. to develop    

B. developing    

C. developed    

D. develop

A number of foreign guests were invited to the party, but 20 of them didn’t___________.

A．turn up

B．break up

C．look up

D．make up

“成本加固定酬金法”中的固定酬金用于( )。

A．不可预见费

B．可报销费用

C．投资利息

D．利润

E．奖金

检验的显著性水平是（）。

A、第一类错误概率

B、第一类错误概率的上界

C、第二类错误概率

D、第二类错误概率的上界

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