氨蒸发器进行氮气置换，第一次充氮压力达到（）MPa时停止充氮。
A.0.5
B.0.6
C.0.7
D.0.4
参考答案：B
根据括号中所给的汉语写出单词，使句子意思完整正确。
1. The little boys always ________ (拒绝) to do so much homework every day.
2. Could you give me some ________ (建议) on how to learn English well.
3. The twin brothers share ________ (相似的) characteristics.
4. I am pleased if he can________ (接受) our invitation.
5. Amy's mother is busy doing her business, so she can't ________ (留出,匀出) time for her daughter.
如何判断锅炉“四管”泄漏？
