单项选择题

The phrase "stumbling block" may best refer to ______.

A．obstacle
B．motivation
C．acceleration
D．deceleration
<上一题 目录 下一题>
热门 试题

单项选择题
According to the passage, which may be the best title
A．Storing Used Nuclear Fuel
B．Dealing with Nuclear Waste
C．Renewable Nuclear Power
D．Environment and Resources
单项选择题
By the first sentence of the passage the author means the US scientists______.
A．at large
B．at best
C．well-paid, but less productive
D．well-funded, but less informed
相关试题