小明打开一瓶矿泉水,喝几口后,瓶内矿泉水的属性(或特性)发生了变化的是( ) A

题型:选择题

问题:

小明打开一瓶矿泉水,喝几口后,瓶内矿泉水的属性(或特性)发生了变化的是(  )

A.密度

B.质量

C.导电性

D.比热容

考点:质量及其特性
题型:选择题

如图所示,MN为一竖直墙面,图中x轴与MN垂直,距墙面L的A点固定一点光源.现从A点把一小球以水平速度向墙面抛出.则小球在墙面上的影子的运动应是(  ).

A.自由落体运动

B.变加速直线运动

C.匀加速直线运动

D.匀速直线运动

题型:选择题
Where have you _____? Wu Dong is looking for you. Now he has _____ to the playground.

A. gone, gone
B. gone, been
C. been, gone
D. been, been
题型:选择题

(三)伟达公司2009年共实现税前收入总额1800万元(其中包括产品销售收入1600万元,国库券利息收入200万元),发生各项成本费用共计1250万元。其中:合理的工资薪金总额175万元,业务招待费90万元,职工福利费45万元,职工教育经费3万元,工会经费9万元,税收滞纳金15万元,提取的各项准备金支出100万元(均未经税务部门批准),其他成本费用支出均符合税法规定。(企业所得税税率为25%)

要求:根据资料,回答题目:

关于所得税的计算,下列说法错误的是()。

A.伟达公司的应纳税所得额为573万元

B.伟达公司的应纳税所得额为458万元

C.伟达公司的应纳所得税为114.5万元

D.伟达公司的应纳所得税为143.25万元

题型:选择题

Today only one person in five in the United States lives within 50 miles of his birthplace. Since the country was first settled, Americans have moved around a great deal, and are often far away from their parents. Because they have broken ties with their past at a young age, chosen their own occupations, established their own homes and developed their own lifestyles, few American children grow up closely surrounded by grandparents, aunts, uncles and cousins as they do in Italy, Nigeria, or India, for example. This along with the fact that modern American families do not have servants has made the “baby-sitter” a vital part of the American scene. A “sitter” is someone who is hired to care for children for a specific length of time—usually relatively short—while the parents are out for an evening, going to a party or a course of study for example. Sometimes the baby-sitter is also hired for longer period, perhaps when the parents are away for a weekend. In such cases the “sitter” is likely to be a mature and motherly woman. For short periods, teen-agers, college students, nursing students, and others are commonly employed on an hourly basis.

From the point of view of convenience, the best sitters are often young people who live in your apartment building or close by in the neighborhood. This gives you a chance to meet the parents and see what they are like. If an emergency occurs, young sitters can call upon their parents quickly for help; you do not have to take them far to see them home at night or pay expensive taxi fares. Another advantage is that young people living close by can usually fill in quite readily on short notice or for short periods of time.

In an apartment house you can ask the superintendent for permission to post a notice for a baby-sitter by the mailboxes. This is often the best way to find out if there is anyone in the building who is interested in baby-sitting. Retired people as well as students are often glad to earn a little money in this way and can be found by such a note.

小题1:A baby-sitter is a person who________.

A.helps to do housework

B.is a cleaning woman

C.looks after children while their parents are out

D.takes care of babies and cooks for the family小题2:It is advised that when you are out for short periods, you may hire________ to be baby-sitters.

A.motherly women

B.retired people

C.young people

D.mature women小题3:The best title for the passage is________.

A.American Families

B.Baby-Sitters

C.A Way of Earning Money for Young Students

D.A Best Way to Find Baby-Sitters

题型:选择题

下列实验室检查与白塞综合征的病情活动高度相关的是()

A.红细胞沉降率

B.抗口腔黏膜自身抗体

C.C反应蛋白

D.血清黏蛋白

E.铜蓝蛋白

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