可转债具体转股期限应由发行人根据（）确定。 A.可转换债券的存续期 B.流通股价格

用所给词的适当形式填空。

1. Where _______ (do) Mary go on vacation?

2. How often does Mary __________(exercise)?

3. Mr Li ________(run) two miles in the morning.

4. Tom probably___________(work) out twice a day.

5. Billy always ________(wear) a safety helmet(头盔).

6. T doctor asks me to eat ________(little) food.

7. Tom is __________(difference)from Jim.

8. He __________( practice) English every day.

9. Do you think milk is kind of ________(health) food?

10. He has a habit of _________(get)up early.

Could you help me _____ my math? I'm not doing well in it. [ ]

A. to  

B. in  

C. for  

D. with

什么是虚拟水？什么是虚拟水战略？

苏轼的《定风波》，作者面对自然界的晴雨无常及社会人生中政治风云、荣辱得失的无常所持的态度是（）。

A、怨天尤人

B、自我救赎

C、安之若素

D、抑郁消沉

预精馏塔再沸器发生内漏，预精馏塔工艺变化是（）。

A、塔釜温度升高

B、塔釜温度降低

C、塔顶温度降低

D、塔釜液位下降