单项选择题

Biologists have ascertained that specialized cells convert chemical energy into mechanical energy（）

A. determined
B. argued
C. pretended
D. hypothesized

<上一题目录下一题>

热门试题

单项选择题

Without Bob's testimony, evidence of bribery is lacking and（）in the case will be impossible.

A. verdict
B. sentence
C. conviction
D. acquittal

单项选择题

There has been an increase in attendance at lectures（）by the World Affairs Council, which brings international issues to public attention.

A. developed
B. sponsored
C. advanced
D. promoted

相关试题