请在下列句子中选出字音有错误的一项 A.粘贴niān安步当车dàng锐不可当dā

题型:选择题

问题:

请在下列句子中选出字音有错误的一项

A.粘贴niān安步当车dàng锐不可当dāng椎心泣血chuí纳罕hǎn

B.襁褓qiǎngbǎo 隽言妙语juàn 春风骀荡dài衣钵相传bō糟蹋踏tà

C.桑椹shèn切中肯綮qǐng应届毕业yīng相机行事xiàng惊蛰zhé

D.殷红yān风光旖旎yǐnǐ骁勇善战xiāo铮铮誓言zhēng绉妙zhòu

考点:字音
题型:选择题

遗传性牙龈纤维瘤龈增生表现是

A.龈 * * 坏死,有时龈缘呈反波浪状
B.龈缘肥厚,龈 * * 呈球状增大
C.牙龈颜色鲜红或暗紫红,光亮,质地松软,轻触之极易出血
D.牙龈增生呈桑葚状
E.牙龈普遍增生覆盖全部牙冠

题型:选择题

黄河壶口瀑布“三绝”是()。

A.水中螺

B.水帘洞

C.水底冒烟

D.犀牛潭

E.七色彩桥

题型:选择题

Economics has long been known as an unpleasant science. But is any economist so dull as to criticize Christmas? At first glance, the holiday season in western economies seems a treat for those who are concerned with such things as GDP growth. After all, everyone is spending; in America, sellers make 25 % of their yearly sales and 60 % of their profits between Thanksgiving and Christmas. Even so, economists find something to worry about in the nature of the purchases being made.

Much of the holiday spending is on gifts for others. At the simplest level, giving gifts involves the giver's thinking of something that the receiver would like — he tries to guess her preferences, as economists say — and then buying the gift and delivering it. Yet this guessing of preferences is often done badly. Every year, ties go unworn and books unread. And even if a gift is enjoyed, it may not be what the receiver would have bought if they had spent the money themselves.

Interested in this mismatch between wants and gifts, in 1993 Joel Waldfogel, then an economist at Yale University, attempted to estimate the disparity(差距) in dollar terms. He asked students two questions at the end of a holiday season: first, estimate the total amount paid (by the givers) for all the holiday gifts you received; second, apart from the emotional value of the items, if you did not have them, how much would you be willing to pay to get them? His results were unpleasant: on average, a gift was valued by the receiver well below the price paid by the giver.

The most conservative(保守的) estimate put the average receiver’s valuation at 90% of the buying price. The missing 10% is what economists call a deadweight loss; a waste of resources that could be avoided without making anyone poorer. In other words, if the giver gave the cash value of the purchase instead of the gift itself, the receiver could then buy what she really wants and be better off for no extra cost. It suggests that in America, where givers spend $40 billion on Christmas gifts, $ 4 billion is being lost annually in the process of gift giving. Add in birthdays, weddings and non Christian occasions, and the figure would balloon. So should economists call for an end to gift giving, or at least press for money to become the gift of choice?

56. Why do some people regard the holiday season in western economies a treat?

A. Because the economic situation in US has been depressing.

B. Because American sellers make a quarter of their yearly sales through holiday season.

C. Because holiday spending can speed up GDP growth.

D. Because sellers can make as much profit as 60 % over holiday season.

57. What's the main idea for the second paragraph?

A. In many cases the gifts cannot meet the receivers’ needs.

B. The purchases made over holiday season are actually a waste of money.

C. It's really not easy to guess the others’ preferences.

D. Much of the holiday spending is on gifts for others.

58. The purpose of Joel Waldfogel's study is to _____.

A. prove the mismatch between wants and gifts

B. estimate the disparity between wants and gifts in economic terms

C. spark new ideas of economic studies on holiday spending

D. discover the exact cost of holiday spending on gift giving 

59. Economists think of the misusing 10% of holiday spending as a deadweight loss because

_______.

A. the cash value of the purchase is lower than the buying price

B. it is actually a waste of resources in economic terms

C. with the money the receivers can be better off for no extra cost

D. it makes many people even poorer for spending more on unwanted gifts

60. According to the passage altogether how much money is wasted every year on gift giving?

A. About $4 billion.                                  B. About 10% of the total value.

C. About $40 billion.                              D. Much more than $4 billion.

题型:选择题

脊髓小脑共济失调的确诊依据是()

A.病史和体征

B.家族史

C.基因检测

D.实验室检查

E.影像和神经电生理检查

题型:选择题

下列叙述中正确的是

A.数据库系统是一个独立的系统,不需要操作系统的支持

B.数据库设计是指设计数据库管理系统

C.数据库技术的根本目标是要解决数据共享的问题

D.数据库系统中,数据的物理结构必须与逻辑结构一致

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