药品经营企业必须制定和执行（）。 A.进货检查验收制度 B.药品保管制度 C.检查制

根据本经子母补泻取穴法，心经虚证应选用()

A.神门

B.少冲

C.太白

D.太冲

E.大敦

若是a、b是互为相反数，c、d是互为倒数，则2004（a+b）-3cd=（    ）。

Everybody can suffer from stress(压力). No matter what your age is, you can feel stressed out by things that are happening in your life. Teenagers, however, have many more opportunities(机会) to get stressed than people in any other age group. Being a teenager is hard. You are not a child any more, but you are not an adult, even though you have to deal with some very grown-up problems and decisions. Families can be one of the biggest causes of stress, such as problems with parents arguing at home, or problems with brothers and sisters. Teenagers also have a lot of stress from school, either from their teachers or from their friends. Some teenagers also feel stressed about choosing their education after high school. Getting a place at university(大学) can be very difficult and some cannot afford to go to university. The stress about getting a job when finishing school is hard for some teenagers. There are so many young people finishing school and not enough jobs for them. Sadly, there is nothing we can do to remove these causes of stress from the 1ives of teenagers, but you can learn the best way to deal with it. Talking to people is one of the best ways to deal with stress. It may sound simple(简单), but it is true. A problem shared is a problem halved(减半).

根据短文内容判断正误，正确的写(A）、错误的写（B）。

小题1:Being a teenager is often difficult because adults often make them feel stressed.

小题2:Families can add to the stress a teenager might experience by asking them to go to university.

小题3:When many teenagers finish school ,they may worry about becoming an adult.

小题4:Finding a job after finishing school can be difficult because there is a lot of competition for jobs.

小题5:There are many things we can do to deal with stress.

下列说法正确的是（　　）

A．增大压强，活化分子数增加，化学反应速率一定增大

B．升高温度，活化分子百分数增加，化学反应速率一定增大

C．活化分子间所发生的分子间的碰撞为有效碰撞

D．加入反应物，使活化分子百分数增加，化学反应速率增大

利用外源基因在受体细胞中表达，可生产人类所需要的产品。下列各项中能说明目的基因完成了在受体细胞中表达的是（）

A.棉花二倍体细胞中检测到细菌的抗虫基因

B.大肠杆菌中检测到人胰岛素基因及其mRNA

C.山羊乳腺细胞中检测到人生长激素DNA序列

D.酵母菌细胞中提取到人干扰素蛋白