女性，70岁，1周来晕厥两次，心电图示P波与QRS波群二者互不相关，P波频率为80次

女，22岁，劳力性心悸气促1年，昨晚2时突起呼吸困难，不能平卧，咳吐大量粉红色泡沫痰。查体：唇发绀，心尖区触及舒张期震颤，心尖区闻舒张期隆隆样杂音，第一心音增强，肺部布满大量哮鸣音及湿性啰音。(以下2题共用题干)

该病人的诊断为（ ）。

A．二尖瓣狭窄急性左室功能衰竭

B．二尖瓣狭窄肺部感染

C．二尖瓣关闭不全伴心力衰竭

D．二尖瓣脱垂伴心力衰竭

E．二尖瓣狭窄急性肺水肿

对于重点培育品牌，烟草商业企业需要监测品牌销售走势，确保品牌的()。

设N_A为阿伏伽德罗常数的值，下列说法中正确的是

A．常温下，16gO₂和O₃的混合气体中含有l．5N_A个氧原子

B．常温下，1Llmol·L^-1Na₂CO₃溶液中所含的CO₃^2-为N_A

C．58g乙烯和乙烷的混合气体中碳原子数目一定为4NA

D．常温常压下，足量的Fe在lmolCl₂中充分燃烧，转移的电子数为2N_A

用所给词的适当形式填空。

1.—What are you __________ (go) to be when you __________ (grow) up?

   —I'm going __________ (be) a __________ (profession) basketball player.

2. Mike is going to be a computer __________ (program) when he __________ (grow) up.

3. To become a professional basketball player,her brother is going

   to practice __________ (play) basketball every day.

4. He is going to take ___________ (act) lessons because

    he wants __________ (be) an actor.

5. He is going to be an __________ (engine), and he wants

    to study math __________ (real) hard.

6. There are lots of art __________ (exhibition) there.

7. I'm going to study __________ (France) at the same time.

8. Some parents want to study the subjects their children learn at school.

   They want to c__________ better with their kids.

长期应用激动药，可伎相应受体数量（ ），这种现象称为（ ），它是机体对药物产生（ ）的原因之一。