抛射剂的作用是（）.A、药物的溶剂 B、药物的稳定剂 C、喷射药物的动力 D、使药物

Young people can have problems with their minds. Some students become worried because they have to study very hard and they have too much homework to do every day. Others have trouble getting on well with people like their teachers and classmates.

Liu Wei, a junior 2 student from Shandong, could not understand his teacher and was doing badly in his lessons. He became so worried about it that he started to cut his finger with a knife.

Another student, Xiao Li from a university in Shanghai, got on badly with his roommate, Xiao Huang. He killed his roommate Xiao Huang by poisoning(投毒) the water in the drinking machine in their dormitory（寝室）.

A recent report says about 18% of teenagers（青少年） have mental(精神上的) problems. Their troubles include being worried and very unhappy, and having problems in learning and getting on with people. Many students who have problems won’t go for advice or help. Some think they will look stupid if they go to see a doctor. Others don’t want to talk about their secrets.

Liang Hong, an expert（专家） on teenagers from Beijing Hospital has the following advice for teenagers:

Talk to your parents or teachers often.

Take part in group activities and play sports.

Go to see a doctor if you feel unhappy or unwell.

小题1:Liu Wei cut his finger with a knife because _______.

A．he was afraid ofh isteacher

B．his finger was badly hurt

C．he didn’t look cool

D．he was so worried about his studies小题2:What was Xiao Li’s problem?

A．He did badly in his lessons.

B．He had a bad headache.

C．He had trouble getting on well with his roommate.

D．He didn’t afford to pay for his education.小题3:If a student often feels worried and unhappy, he or she may have ______.

A．mental problems

B．a cold

C．no family

D．no money小题4:Students who have problems won’t go to see a doctor because ______.

A．they don’t think doctors can help them

B．they think they will look stupid

C．they can’t afford it

D．they don’t think their problems are serious小题5:What should we do if we have problems with our minds?

A．We should argue with others.

B．We should eat more.

C．We should talk to others often.

D．We should cut our fingers.

急性中毒会使人产昏迷痉挛，失去（）。

A、知觉

B、味觉

C、体力

D、智力

摄影基线

某服装厂为本厂职工加工了一批工作服，其制造成本为18万元，同类产品成本利润为8%，按同类产品售价计算的销售价格为27万元，则该批加工工作服计征增值税销项税的依据为( )万元。

A．18

B．19.44

C．19.8

D．27

价格评估鉴定的基本方法。