空船航行时,舵面有一部分可能会露出水面,若航速较高,就会出现舵力下降.这是主要因为发生了:()
A.失速现象
B.空气吸入现象
C.空泡现象
D.伴流现象
参考答案:B
根据对话内容,在每个空白处填入一个适当的单词,使对话意思完整正确,含缩写。
A: __1__ I ask a question,Lin Tao?
B: Yes, please.
A: __2__ does the word "Traffic"mean?
B: I'm__3__ I don't know. Zhang Li may know.
A: __4__ me, Zhang Li. Can you help me?
C: Certainly.
A: What does "Traffic" mean?
C: I'm not ture.__5__ better ask Han Ling.
A: Hello,Han Ling. I want to__6__ you a question.
D: OK.
A: What does the word "Traffic"mean?
D: __7__ means "All the vehicles ( 车辆) __8__ people that are moving in the roads and streets. "
A: __9__ a lot.
D: It's a __10__ .
旋覆代赭石汤与橘皮竹茹汤中均含有的药物是
A.人参、生姜
B.人参、半夏
C.陈皮、半夏
D.桔梗、半夏
E.茯苓、枇杷叶