换热器安装防冲板的作用有（）。A.保护壳体 B.保护管束 C.降低流速 D.避免震动

第二节（共5小题；每小题2分，满分10分）

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项多余选项。

There is an English saying, “Laughter is the best medicine.”51   Now, however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter really can improve people’s health.

Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their heart, blood pressure, breathing and muscles. 52  It increases blood pressure, the heart beating and breathing; it also works several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial.

53 In one experiment doctors produced pain in groups of students who listened to different radio programmes. The group that tolerated (忍受)the pain for the longest time was the group which listened to a funny program. 54 

In this way55   they help to improve their patients’ condition by encouraging them to laugh. They have found that even if their patients do not really fell like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.

A．The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemicals in the brain which diminish both stress and pain.

B．Until recently, few people took the saying seriously.

C．Laughter and physical exercise have similar effects on the human body.

D．It was found that laughter has similar effects to physical exercise.E. As a result of these discoveries, some doctors in the United States now hold laughter clinics.

F. Laughter could produce a kind of chemical.

G. Other tests have shown that laughter appears to be able to reduce the effect of pain on the body.

社区护士建立健康档案时发现，辖区有家庭需要提供护理服务。该家庭单亲家庭，有一青春期少女患慢性疾病，需要居家接受护理，而其母亲由于家庭困难需要上班。此家庭需要调适的家庭功能是（）

A.经济上支持

B.家庭角色的重新分配

C.家庭的社会化

D.家庭治疗的利用

E.家庭情绪上的支持

工程保险的主要险种不包括( )。

A．承保土木建筑工程由于一切不可预料及突然发生的事故造成损失、费用和责任的建筑工程一切险

B．承保安装设备过程中由于一切突发事故及安装不善等造成损失、费用和责任的安装损坏保险

C．承保机器设备因设计制造和安装错误、工人技术人员操作失误、离心力引起断裂、锅炉缺水等造成损失的机器损坏保险

D．承保船舶建造全过程因自然灾害、意外事故、设备故障、设计错误、潜在缺陷、清除残骸等造成损失及费用和对第三者船、货、码头建筑物造成损失赔偿责任的船舶建造险

主要引起泌尿系统毒性反应的药物是（）

A.马钱子

B.蟾酥

C.斑蝥

D.枳实

E.苦杏仁

4岁男孩，5天前咳嗽、流涕，体温38．5℃，曾诊断"上感"，对症处理无效，精神差，嗜睡，间有呕吐，晨起抽搐，继而昏迷，就诊时心跳已停止，抢救无效死亡。脑脊液：外观清亮，细胞数280×10／L，N0．20，L0．80，蛋白质500mg／L，葡萄糖4mmol／L，氯化物118mmol／L。分析死因，你认为下列哪种病最有可能（）

A.化脓性脑膜炎

B.病毒性脑炎

C.中毒性脑炎

D.结核性脑膜炎

E.败血病