简述表象的基本特征。
参考答案:
The teacher is strict _____ every student and _____ everything he does. [ ]
A. in; on
B. on; with
C. with; on
D. with; in
在装载航行中,当甲板主管中压力降至()时,就需要进行充气。
A、200mmHg
B、200mmH2O
C、0mmH2O