At that time, she()on a journey with her friend
A. is
B. was
C. has been
D. is being
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出血性脑卒中CT扫描示出血区出现低密度影。
A. 正确
B. 错误
看完电视后,可以用湿冷抹布擦拭后盖及荧光屏
A. 正确
B. 错误
At the()of the police, those people ran off in all directions.
A. sight
B. look
C. watch
D. view
当去游离过程小于游离过程时,电弧中带电质点增多,则()电弧。