下列属于取代反应的是[ ] A．甲烷燃烧 B．在镍做催化剂的条件下，苯与氢气反应

—Will you take part in the speech contest？

— ________I have long been expecting such all activity．

A．Not at a11．

B．It’s my pleasure．

C．But why?

D．That’s for sure．

—Are you free this afternoon?

—________ I have to meet my brother in the station (车站). [ ]

A. I think so.

B. Yes, I am.

C. I'm afraid not.

D. Right.

文化对人的影响主要有哪些？

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下列选项中属于创业者六忌的内容的是（）。

A.忌盲目跟风和急功近利

B.忌交友不慎和心胸狭隘

C.忌自以为是和太重理论教条

D.以上都对

养老保险基金是如何管理和使用的？