引起肺炎的病原体主要是（） A.细菌 B.真菌 C.支原体 D.病毒 E.立克次体

下列有关反向期现套利的说法，正确的是（）。

A.“反向市场”中，期货价格大于现货价格

B.反向套利是构建现货空头和期货多头的套利行为

C.由于现货市场中不存在做空机制，反向套利的实施受到极大的限制

D.拥有现货库存的企业为了降低库存成本会考虑实施反向期现套利

各级（）和承担防汛抗洪任务的部门和单位，必须根据防御洪水方案做好防汛抗洪准备工作。

A.人民政府

B.主管部门

C.防汛指挥机构

D.主管单位

发审委审核上市公司非公开发行股票申请，适用普通程序。（）

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，选项中有两项为多余选项。

     People know the dangers of fires. It's good for a family to learn how to prepare for a fire. Here are some

suggestions:

     Put a smoke alarm in the house. Smoke from a fire causes the alarm to go off. 1._____ The sound tells

everyone to leave the house at once.

     Make escape plans. You should know all the ways out of the house. If there is a fire, everyone follows

the plan to get out. Part of the plan is to check all the windows to make sure they can be opened easily.

     Buy fire extinguishers (灭火器) in the house. 2._____ 

     Practise for a fire at home now and then because it can teach children about fire safety, Everyone in the

family should know the following fire rules: 

     3._____ The fire can grow more quickly if you open the door.

     Stay close to the floor! 4._____ The best air is near the floor because smoke rises.

     What will you do if your hair or clothes start to burn? First, stop! 5._____ The fire bums faster because

of more air. Drop! Fall to the floor. Then roll! Turning over and over will make the fire go out. Put a blanket

around you to keep air away from the fire that may still be on you.

     There are many possible causes for fires. A wise family is ready all the time. If there is a fire, don't forget

to call 119 for help.

A. Don't run!

B. Everyone in the family should know how to use them.

C. Everyone should follow your plan.

D. Smoke can be more dangerous than fire.

E. The alarm makes a loud sound.

F. Open the windows!

G. Don't open a hot door!

滑坡推力作用点可取在（）。

A.滑体厚度的底部

B.滑体厚度的中部

C.滑体厚度的顶部

D.滑体厚度的1／3处