责任成本管理运行流程

下列不能作为心脏超声造影剂重要成分的是（）。

A.单纯糖类颗粒

B.氟碳气体

C.氧气体

D.人体白蛋白

E.室内空气

将代数式x²+4x-1化成（x+p）²+q的形式为[ ]

A.（x-2）²+3

B.（x+2）²-4

C.（x+2）²-5

D.（x+2）²+4

根据第1题概括出的问题，谈谈如何将家电汽车以旧换新、下乡等政策落到实处。要求：有针对性、可行性，字数不超过400字左右。

阅读理解

     Koala bears as pets might be appealing to many of us. However, there are quite a few points

to consider even before thinking of adopting one.

     In Australia the koala is a priority animal as far as conservation status assessment is concerned.

It was hunted to near extinction(灭绝)for its fur. In fact the koala had been wiped out from South

Australia in the 1920s. However, ehabilitation efforts have brought the animal back in the state. As

for the Australian government, the koala is not a threatened animal, but the US government does list

the koala as one.

     Almost everyone finds koala adorable in the zoo. However, as far as having koala bears as pets

is concerned, there are legal issues to consider. Other than that, being able to provide for its diet and

habitat is another point that needs some attention before any law legalizing their adopting as pets is passed.

1. What is the author's attitude towards people raising the koala?

A. Passive.  

B. Grateful.    

C. Negative.    

D. Enthusiastic.

2. Why did Australians hunt the koala?

A. To get its fur.    

B. To eat its meat.  

C. To wipe it out.  

D. To have it for fun.

3. It can be inferred from the passage that _____.

A. koala bears tend to live in groups.    

B. koala bear care can be very demanding

C. koala bears are not particular about their food.    

D. koala bears are the No.1 threatened animal in the US.

应用水提醇沉淀法精制中药提取液时，应注意哪些问题？