下列分子为直线形分子且分子中原子都满足8电子稳定结构( ) A.BeF2 B.

题型:选择题

问题:

下列分子为直线形分子且分子中原子都满足8电子稳定结构(   )

A.BeF2

B.C2H4

C.SO2

D.CO2

考点:无机分子的立体结构
题型:选择题

女性,31岁,生育史1-0-0-1,因诊断为葡萄胎收入院。当天行刮宫术,吸出多量水泡样组织,7天行第2次刮宫术,术后2周尿HCG(-),血β-HCG<3.0U/L。该患者出院后应该何时再复查()

A.1周后

B.1个月后

C.3个月后

D.半年后

E.1年后

题型:选择题

TRIPS协议的基本准则不包括( )。

A.国民待遇
B.对外开放
C.最惠国待遇
D.技术进步

题型:选择题

输送机栈桥由()组成

A.筒体

B.支承结构

C.基础

D.廊身

E.仓斗

题型:选择题

Shopping habits in the United States have changed greatly in the last quarter of the 20th century. (1) in the 1900s most American towns and cities had a Main Street. Main Street was always in the heart of a town. This street was (2) on both sides with many (3) businesses. Here, shoppers walked into stores to look at all sorts of merchandise: clothing, furniture, hardware, groceries. (4),some shops offered (5) .These shops included drugstores, restaurants, shoe-repair stores, and barber or hairdressing shops. (6) in the 1950s, a change began to (7) .Too many automobiles had crowded into Main Street (8) too few parking places were (9) shoppers. Because the streets were crowded, merchants began to look with interest at the open spaces (10) the city limits. Open space is what their car-driving customers needed. And open space is what they got (11) the first shopping centre was built. Shopping centres, or rather malls, (12) as a collection of small new stores (13) crowded city centres. 14 by hundreds of free parking space, customers were drawn away from (14) areas to outlying malls. And the growing (16) of shopping centres led (17) to the building of bigger and betterstocked stores. (18) the late 1970s,many shopping malls had almost developed into small cities themselves. In addition to providing the (19) of one stop shopping, malls were transformed into landscaped parks, (20)benches, fountains, and outdoor entertainment.

请在20处填上正确答案()

A.because of

B.and

C.with

D.provided

题型:选择题

Regardless of their political affiliation, in all countries women must overcome a host of stumbling blocks that limit their political careers. "Most obstacles to progress consist of (1) of various kinds," says the Inter-Parliamentary Union (IPU), a Geneva-based organization (2) 139 parliaments, including the lack of time, training, information, self-confidence, money, support, motivation, women’s networks and solidarity between women.

In every culture, prejudice and stereotypes (3) hard. The belief still holds (4) that women belong in the kitchen and (5) the children, not at election (6) or in the Speaker’s chair. The media often reinforce traditional images of women, who, upon entering politics, also bear the brunt (正面冲击) of verbal and physical (7) .

In impoverished (贫穷的) countries (8) by civil conflicts and deteriorating economic and social conditions, women are (9) by the tasks of managing everyday life and looking after their families.

The IPU stresses the general lack of child-care facilities—often (10) a privileged few—the (11) of political parties to change the times and running of meetings and the weak backing women receive from their families. That support, which is (12) as well as financial, is (13) vital because women have internalized (14) images of themselves since the (15) of time and often suffer from low self-confidence.

Another obstacle is the lack of financial resources, especially as election campaigns become increasingly expensive. (16) , women encounter more or less open machismo (男子汉的高傲) in the (17) of closed political circles (18) entry to the "second sex. " Lastly, they (19) the lack of solidarity between women, (20) by the fact that the number of available positions is limited.

5()

A.with

B.to

C.among

D.into

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