以下关于血培养说法，不正确的是（） A.高热时采血进行培养 B.即时送检 C.每次采

If you put a buzzard(秃鹰) in a cage without a roof(顶棚), the bird will be a prisoner. Even though it can fly, it can’t fly through the open roof. The reason is that a buzzard always begins a flight from the ground with a run of 3 or 4 meters. Without space to run, he will not even try to fly, but will stay in his small jail(监牢) for the rest of his life.

The ordinary bat that flies around at night cannot take off from the ground. If it is placed on the ground, all it can do is shuffle(穿梭) about helplessly. If it reaches a higher place, it will be able to throw itself into the air. Then it takes off quickly. But on flat ground, it will never fly.

A bee dropped into a cup will be there until it dies, unless it is taken out. It never sees the means of escape at the top, but keeps trying to find some way out through the sides near the bottom. It will look for away where none exists, until it completely destroys itself.

In many ways, there are lots of people like the buzzard, the bat and the bee. They are struggling with all their problems and frustrations(挫折)，not realizing that the answer is right there above them.

小题1:A buzzard can’t fly through the open roof of a cage because       .

A．it is too big and heavy to fly up

B．it feels the space is too small to start the flight

C．it gets used to living in the cage without a roof

D．it would like to spend the rest of his life in the jail小题2:Paragraph 2 mainly tells us that        .

A．the bat is a kind of smart bird

B．the bat can take off quickly on flat ground

C．the bat flies only at night

D．the bat can only take off from a higher place小题3:Which is NOT true about the bee?

A．The bee doesn’t try to find a way to escape.

B．The bee will die if it isn’t taken out of the cup in time.

C．The bee always wants to escape from the cup near the bottom.

D．The bee doesn’t see the way out at the top.小题4:What’s the purpose of the story?

A．Many people are like the buzzard, the bat and the bee.

B．Animals will also give up when in trouble.

C．We should try new ways to deal with difficulties.

D．We should solve problems by ourselves.

某有色金属公司四种主要有色金属总产量的1/5为铝，1/3为铜，镍的产量是铜和铝产量之和的1/4，而铅的产量比铝多600吨。问该公司镍的产量为多少吨？

A.600 

B.800 

C.1000 

D.1200

按照租用期限，电话电路出租业务分为临时租用和（）两种。

在C++中，打开一个文件，就是将这个文件与一个 【8】 建立关联，关闭一个文件，就是取消这种关联。

大象能发出多少种从高到低不同的低频声？（）

A.25种

B.30种

C.35种

D.40种