人的皮肤损伤以后，易受到细菌的感染而发炎；而正常情况下皮肤不会因某些细菌的存在而

一只不透明的袋子中装有白球2个和黄球1个，这些球除颜色外都相同，搅匀后从中任意摸出1个球，记下颜色后不放回，搅匀后再从中任意摸出1个球，请用列表或画树状图的方法求两次都摸出白球的概率．

在一定温度下，一定量的Ca（OH）₂饱和溶液中，加入少量的CaO并维持温度不变，则下列说法中正确的是

A．溶液的pH增大

B．溶液的pH减小

C．溶液中的Ca²⁺总数减少

D．溶液中的Ca²⁺总数增加

水平地面上有一个重为4 000 N的箱子，箱子的底面积为4 m²。现用起重机把箱子吊到3 m高的位置，所用时间为10 s，起重臂下的钢丝绳是绕在一个动滑轮上的，如图所示。钢丝绳上的拉力为2 500 N。试求：

（1）起重机起吊前，箱子对地面的压强是多少?

（2）起重机起吊该箱子的机械效率是多少?

（3）钢丝绳上拉力的功率是多少?

某企业发现自己的安全生产许可证遗失，其正确做法是（）。

A.向原发证机关声明作废并申请补办

B.向原发证机关申请注销，待该许可证有效期满后补发

C.由原发证机关通报原件作废，按规定罚款后补发

D.向原发证机关报告，并在媒体上声明作废后，申请补办

阅读理解。

     The peoples of the Scandinavian countries share a lot in common for geographical reasons. But there

are more of differenoes than similarities between them in all ways, including their drinking customs.

     A superficial (表面上的) observer might think that no one in Ndrway drinks wine. Meals eaten in

restaurants or at home are usually washed down with tea, coffee or milk. Occasionally however, pale or

dark ale (麦芽酒) is drunk. It can be ordered only in restaurants, where it is served only with food.

     Excellent quality beers are made in Jutland and the price is high. After beer, brandy is the favorite

drink. Aalborg schnapps made from corn and potatoes, is famous for its high alcoholic content. For the

Danes, brandy is also an aperitif (开胃酒) and is often drunk before meals. For a foreigner, the practice

of surrounding toasts here can be uncomfortable. If he accepts one toast then he will have to accept all

others, and it is difficult to drink six or seven glasses of brandy unless one is used to it. IAdies are

fortunately excluded from these rounds and they drink only a grape juice with almost no alcoholic content.

     It is milk instead of liquor that is the principal (最重要的; 主要的) Finnish table drink. More milk is

drunk by the Finnish people than in any other nation. In Finland the sale of alcohol is a state behavior and

a check is kept on consumption by recording purchases on special card issued to all customers.

     As there is a difference between Swedish cooking in the south and that in the north because of the

difference in soil and climate, their drinking habits are also different. In the north alcoholic beverages (烈

酒) are considered a necessity because they keep out the cold. While in the south people have milder drinks.

But generally speaking, too much drinking is rare in Sweden, partly because it is against the law.

     Sale of spirits is controlled, the Swedes drink much coffee and tea. Many people still prefer the old-

fashioned coffee served in large cups with cakes. Tea is so popular in Sweden that it has been called the

Swedish national drink.

1. According to the passage, which of the following is the Swedish national drink?

A. Tea.

B. Brandy.

C. Aperitif.

D. Grape juice.

2. Which of the following people like milk more than other drinks?

A. The German people.

B. The American people.

C. The Finish people.

D. The French people.

3. It can be inferred that if a foreigner isn't good at drinking brandy, he _____.

A. would like to invite ladies to have a party

B. is unwilling to have a surrounding toast

C. would like to accept others' toasts

D. will often drink milk instead of brandy