创业咨询信息的收集原则有哪些？如何进行收集？

硅及其化合物在材料领域中应用广泛。下列说法正确的是

A．硅酸钠可用于制备木材防火剂

B．硅单质广泛用于光纤通讯

C．利用盐酸刻蚀石英制作艺术品

D．水晶项链是硅酸盐制品

阅读下面的短文，掌握其大意，然后从各题所给的四个选项（A、B、C、D）中选出最佳选项，并在答题卡上将该项涂黑。

When I smoked with my family, I would feel so   16  and good that nothing else in the world seemed so   17 . I thought that smoking weed (烟草) was okay since many of my family members and people at my school smoked.  18  ever happened to them.   19  I started smoking weed a lot more during lunch and after school. I never thought   20  of it. At that time I just wanted to smoke. Then I began to   21 in school. I would   22  classes, come home late and spend all my money. I would spend   23  8 to 18 dollars a day. I never thought   24  that marijuana (大麻) had a bad effect on those things. Maybe my coming to class high (神智恍惚) was the reason why I was failing or coming home late. As I continued to smoke marijuana, I began to notice that I would always have the strong desire to smoke and that I would get   25  cigarettes if I smoked those, but I don’t.   26  I have learned more about marijuana, I have   27  the amount of marijuana that I use. I don’t want marijuana to be the most important in my life. I’m not smoking every day, and not spending as much money. Since I have   28  on my habit, I am   29  more money. I’m ready to go back to school and do good, so that I can make myself  50 . Everyone is always saying how weed   31  your mind and how it solves problems. I think it only brings more   32 . Marijuana is not good for your body or your brain. I’m not trying to tell you not to smoke, I’m just letting you know that marijuana can be   33  to your health, and   34  it may cause some long term negative (负面的) effects. Help yourself now, before it is too late. I don’t want to lecture anyone, just   35  my experience with you.

小题1:

A．worried

B．relaxed

C．disappointed

D．moved小题2:

A．important

B．common

C．interesting

D．funny小题3:

A．something

B．Everything

C．Nothing

D．Anything小题4:

A．By the way

B．Now and then

C．In my opinion

D．For a time小题5:

A．too much

B．a little

C．too often

D．any more小题6:

A．get ahead

B．fall behind

C．come across

D．make up小题7:

A．give

B．have

C．attend

D．cut小题8:

A．at least

B．at most

C．no more than

D．as little as小题9:

A．once

B．twice

C．again

D．further小题10:

A．used to

B．paid for

C．lost in

D．ready for小题11:

A．as if

B．Even if

C．Now that

D．As long as小题12:

A．reduced

B．increased

C．bought

D．continued小题13:

A．broken down

B．cut down

C．turned off

D．cut off小题14:

A．wasting

B．spending

C．making

D．saving小题15:

A．less

B．more

C．better

D．worse小题16:

A．excites

B．fills

C．repairs

D．destroys小题17:

A．problems

B．pleasure

C．convenience

D．excitements小题18:

A．helpful

B．useful

C．dangerous

D．strange小题19:

A．in the beginning

B．in the distance

C．in the long run

D．in the past小题20:

A．tell

B．explain

C．regret

D．share

是两个以上的二级结构的集合。（）

A.三级结构

B.一级结构

C.超二级结构

D.二级结构

E.四级结构

计算机动画

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