用测回法对某一角度观测6测回,第4测回的水平度盘起始位置的预定值应为()。
A.30º
B.60º
C.90º
D.120º
参考答案:C
句型转换。
1. We had a big welcome meeting yesterday evening. (对画线部分提问)
_____ _____ you _____ a big welcome meeting?
2. She often does some washing on Sunday morning. (改为一般过去时态)
She _____ _____ _____ this Sunday morning.
3. I have already finished reading the novel. (改为否定句)
I _____ finished reading the novel.
4. My sister has got a rat snow globe. (对画线部分提问)
_____ _____ your sister got?
5. We've never learned Japanese. (改为反意疑问句)
We've never learned Japanese, _____?
卡介苗的接种对象主要是()
A.新生儿
B.结核流行区内的所有儿童和成年人
C.严重结核病患者
D.结核菌素试验阳性者
E.结核菌素试验阴性者