产生潮汐的原动力是(),其中主要是()。
A.月球的引潮力;太阳的引潮力
B.天体引潮力;太阳的引潮力
C.天体引潮力;月球的引潮力
D.太阳的引潮力;月球的引潮力
参考答案:C
假如你是李明的母亲,请根据对话内容完成电话留言。(3分)
A: Hello. I’d like to speak to Li Ming.
B: Sorry. He isn’t in right now.
A: Oh. Can I leave a message?
B: Sure, go ahead.
A: This is Zhang Han speaking. Please tell him not to forget to take his camera tomorrow.
B: OK. Zhang Han . I’ll give him the message myself.
A: Thanks. Goodbye.
B: Bye.
34Mn2V属于()。
A.工具钢
B.船体用钢
C.焊接气瓶用钢
D.钢轨钢