通过锁骨中点向下的垂直线为 A．佝偻病 B．小脑疾病 C．震颤麻痹 D．脑性瘫痪 E

A young American doctor was sleeping when suddenly his doorbell began to ring. It was already midnight, but what could the doctor do? He had to get up, put on his coat and go downstairs.

When he opened the door, he saw a man standing with a hat in his hand. “How do you do?” said the man,“ Can you come at once to a place out of town? It’s quite far but you have a car and I can show you the way.”

“Certainly,” said the doctor, “I’m quite ready. I can come at once.” After a few minutes the car was standing at the front door, the man got into the doctor’s car, and they drove off.

They drove on for a long time. Then the man said, “Here we are. This is my home. Now I can pay you and you can go back to town.”

“I must see the patient. How can I go back without seeing the patient?”

“There is no patient,” explained the man. “Nobody is ill. I live here, you see, and one must get home from a town, mustn’t he? There are no taxis this time of the night, but a doctor often makes night calls, so excuse me. Here is money. Thank you, doctor. Good night.”

小题1:The doctor ____ when the doorbell started to ring.

A．was sleeping upstairs

B．was sleeping downstairs

C．was working upstairs

D．was working downstairs小题2: The man asked the doctor _____.

A．to go out for a walk

B．to go to a place out of town

C．to see a patient

D．to go for a vacation小题3:They left _____.

A．on foot

B．by bike

C．by bus

D．by car小题4:What the man wanted to do was only _____.

A. to fool the doctor         B. to give the doctor money

C. to get home in the doctor’s car     D to invite the doctor to his home

小题5:The doctor must be ______ when he heard the man’s words.

A. happy          B. angry      C. sad      D cry

下列( )情形，可适用于海关事务担保。

A．申请扣留或者放行有侵犯知识产权嫌疑的进出口货物

B．应征税货物收发人请求缓缴税款的

C．正在向有关部门办理货物进口许可证，收货人要求海关先放行货物，后补交有关单证的

D．正在向海关申请办理减免税手续，而货物运抵口岸亟待提取或装运，收发货人要求海关缓办进出口纳税手续的

非去极化肌松药与乙酰胆碱受体结合后的变化，正确的是()

A．受体构型改变，离子通道开放

B．受体构型改变，离子通道不开放

C．受体构型不改变，离子通道不开放

D．受体构型不改变，离子通道开放

E．以上全不正确

实验流行病学研究与定群研究的共同点有（）

A.都属于病因研究

B.都是在现场选择实验对象

C.都要求试验组（暴露组）和对照组有均衡性、可比性

D.都采取了人为干预措施

E.都是在自然情况下选择某因素进行观察

不存在其他药物时，吲哚洛尔通过激动p受体致心率增高。但在高效日受体激动剂存在情况下，吲哚洛尔引起剂量依赖性心率降低。因此吲哚洛尔可能是（）

A.不可逆性拮抗剂

B.生理性拮抗剂

C.化学拮抗剂

D.部分激动剂

E.非竞争性拮抗剂