单项选择题

According to this passage, chemistry ______.

A．produces more harmful effects than beneficial ones
B．produces no more harmful effects than beneficial ones
C．is no longer unanimously regarded as the science of the future
D．is not worth pursuing persistently

<上一题目录下一题>

热门试题

单项选择题

The author considers the contentions made by the recent historians discussed in the passage to be ______.

A．potentially verifiable
B．partially justified
C．logically contradictory
D．ingenious but flawed

单项选择题

According to the passage, which of the following is a true statement about sectional conflicts in America between 1763 and 17897 ______.

A．There conflicts were instigated by eastern interests against western settlers.
B．These conflicts were the most serious kind of conflict in America.
C．The conflicts eventually led to openly expressed class antagonism.
D．These conflicts contained an clement of class hostility.