单项选择题

In Paragraph 5, the author refers to a hypothesis as "a leap into the unknown" in order to show that hypotheses ______.

A．go beyond available facts
B．are sometimes ill-conceived
C．can lead to dangerous results
D．require efforts to formulate
<上一题 目录 下一题>
热门 试题

单项选择题
The author says, There was one thing that went wrong with my experiment. What was the one thing that went wrong
A．He praised her sweater, which puzzled her.
B．She insisted on visiting a museum, which he hated.
C．He knew something about her illness but didn't tell her.
D．He was so good to her that she thought she must be dying.
单项选择题
By saying I'm just starting to live, Tom means that ______.
A．he is just beginning to understand the real meaning of life
B．he is just beginning to enjoy life as a loving husband
C．he lived an unhappy life before and is now starting to change
D．he is beginning to feel regret for what he did to his wife before
相关试题