单项选择题

Just as a force is required to change the speed of an object, ______a force must act to cause a change in the direction of the motion.

A. as
B. thus
C. so
D. like
<上一题 目录 下一题>
热门 试题

单项选择题
A new technique______, the yields as a whole increased by 20 percent.
A. working out
B. having worked out
C. having been worked out
D. to have been worked out
单项选择题
If we continue to ignore the issue of global warming, we will almost certainly suffer the ______effects of climatic changes worldwide.
A. dubious
B. drastic
C. trivial
D. toxic
相关试题