精车法向直廓蜗杆时，车刀两侧切削刃组成的平面应垂直于蜗杆齿面安装。( )

以下外用药处方正确的是（）

A.龙胆紫

B.氧化锌

C.水杨酸

D.硫黄

E.10%硫黄软膏

阅读表达

     Every year in the United States about 200 000 people are hospitalized and 36 000 die from the flu.

While colds won't kill you, they can weaken your immune(免疫的)system. We can't promise you'll

never get hit with another cold or suffer the flu, but you can increase your probability of staying well in

these ways.

     Wash your hands often. The Naval Health Research Center conducted a study of 40 000 people

who were ordered to wash their hands five times a day. These people cut their incidence of respiratory

(呼吸的) illnesses by 45 percent.

      Run your toothbrush through the microwave on high for 10 seconds to kill germs that can cause

colds and other illnesses. You think it gets your teeth clean- and it does.

      Get a flu shot every fall. The Centers for Disease Control recommends flu shots for anyone 50 years

old or older. Also, people who work or live with a high-risk person should       _ so they don't spread

the flu. Of course, anyone who just wants to avoid the flu should also get one.

       Stop blaming yourself when things go wrong at work. Believe it or not, blaming yourself makes

you more likely to catch a cold! At least, that's what researchers found when they studied more than

200 workers over three months. Researchers expect such attitudes make people more stressed on the

job, and stress, as you know, can challenge your immune system.

       Leave the windows in your house open a crack in winter. Not all of them, but one or two in the

rooms in which you spend the most time. A bit of fresh air will do wonders for chasing out germs.

1. What's the best title of the passage? (Please answer within 10 words.)

2. Which sentence in the passage can be replaced by the following one?

Although we can't make sure that you never get a cold or the flu, you can probably reduce the  chances

of catching a cold or the flu by using these ways.

3. Please fill in the blank in the fourth paragraph to complete the sentence. (Please answer within 10

words.)

4. What else can you suggest to avoid suffering the flu according to your own experience? Why?

( Please answer within 30 words.)

5. Translate the underlined sentence in the fifth paragraph into Chinese.

简述空盒气压计、空盒气压表的测压原理。

决定一个人是本国人还是外国人的标准，是这个人的（）。

A.血统

B.种族

C.国籍

D.住所

联盟走向破裂的具体原因有哪些？