R717制冷系统,高压系统的试验压力为()。
参考答案:1.8MPa
情景交际。
1. 想请求别人帮忙时应该怎么说:[ ]
A. Can I help you?
B. I can help you.
C. Can you help me?
2. 你想知道公园在哪里,你应该说:[ ]
A. Excuse me, where is the park?
B. Can you tell the park?
C. What is in the park?
3. 如何应答别人的求助: [ ]
A. No, I don't want to tell you.
B. Sure.
C. Thanks.
下列为宋代本草书的是
A.《本草经集注》B.《新修本草》C.《本草纲目》D.《证类本草》E.《神农本草经》