应急舵的操舵特点是()。
①没有反馈装置;
②手柄直接控制舵机;
③只能在机舱操作;
④反馈装置控制机舱开关;
⑤与随动舵相同。
A.①②
B.①~③
C.①②④
D.②~⑤
参考答案:A
胰腺长轴断面应显示()。
A.胰头、钩突
B.胰颈、胰体
C.部分胰尾、主胰管
D.以上各项均是
用所给单词的适当形式填空。
1. Have ever seen the animal with two ________ (stomach)?
2. I haven't decided what ________ (write) about?
3. I prefer ________ (read) poems to ________ (write) them.
4. You can express yourself by _________ (tell) how something looks,feels,sounds,smells or tastes.
5. Would you mind _________ (tell) me the truth?