后轮胎爆裂时，驾驶人应保持镇定，（），极力控制车辆保持直线行驶，减速停车。A、迅速转

阅读理解。在改写后的短文空白处填入一个适当的词，使其完整通顺。

     Most American businesses are open five days a week. American school children go to school five days

  a week, too. American families usually have a two-day weekend. The weekend is Saturday and Sunday.

  Over the weekend, people spend their time in may ways. Many families enjoy weekend together. They

 may go shopping, go for a drive, or visit friends. They may also invite friends over and have a party at

 home. Many families take part in sport during the weekend. Running, hiking, playing volleyball and

 swimming are popular in summer. Skiing and skating are the favorite winter sports. Weekends are also a

 time for American families to work on something in their yards or in the house. Many families plant flowers

  and have vegetable gardens. Some families spend the weekends to paint or repair their houses. For most

  Americans, weekend are very busy.

     Most Americans __1__ five days a week and they have a two-day __2__ .The people of many

  families spend their time in different __3__ . They may go out to see their friends or __4__ friends to

 come to have a party at home. Over the weekend, many people are interested in __5__ , some of them

  like to go __6__  in summer and __7__ in winter.

     Some families __8__ with their flowers and __9__  in their gardens. The others are busy__10__ or

 repairing their houses at the weekend.

感染病原体后不出现临床表现，但产生了特异性免疫，是（）。

A.显性感染

B.隐性感染

C.病原体携带状态

D.潜在性感染

E.病原体被消灭或排出体外

肺痈的辨证要点是

A．三期
B．四期
C．辨气、辨痰、辨血
D．辨性、分期、辨痰
E．辨血、分期、辨痰

冲突理论

喷水分级法将防污闪涂料表面的憎水性状态分为（）级。

A.5

B.6

C.7

D.8