电缆井、隧道内工作时,通风设备应(),以保证()。
参考答案:保持常开;空气流通
句型转换。
1. I also go to the cinema. (改为否定句)
I _____ go to the cinema, ______.
2. Last Saturday my mother bought me a new watch. (改为同义句)
Last Saturday my mother ______ a new watch ______ me.
3. Jenny is in Class 2. Brian is in Class 2, too. (改为同义句)
Jenny and Brian are in ______ ______ class.
4. Mr. Green has worked in the hospital for ten years. (对划线部分提问)
______ ______ _______ Mr. Green _______ in the hospital?
5. May I have another question? (改为同义句)
May I have ______ ______ question?
肾衰竭时最常见的酸碱平衡紊乱类型是()
A.代谢性酸中毒
B.代谢性碱中毒
C.代谢性酸中毒合并呼吸性碱中毒
D.代谢性酸中毒合并呼吸性酸中毒
E.代谢性碱中毒合并呼吸性碱中毒