开车过程中，对各塔底备泵可以用（）方法进行赶水和赶空气。
A、预热
B、蒸汽吹扫
C、切换备用泵
D、打开泵进口阀
参考答案：A, C
按要求完成下列句子，每空一词。
1. It's sunny today. (对画线部分提问)
___________ the ___________ like today?
2. There are twenty birds in the cage. (对画线部分提问)
___________ ___________ birds are there in the cage?
3. Close your book, please. (改为否定句)
___________ ___________ your book, please.
4. Liu Tao is writing a letter to his grandpa. (改为一般疑问句)
___________ Liu Tao ___________ a letter to his grandpa?
5. She watched TV just now. (改为一般将来时)
She is ___________ to ___________ TV this evening.
霍奇金病可出现（）
A．印戒细胞
B．R-S细胞
C．透明细胞
D．Touton多核巨细胞
