维生素C制剂色泽变黄后A．不影响质量 B．增加剂量使用 C．属正常情况 D．与维生素

英美法把合同分为签字蜡封合同和简式合同（simplecontract）两大类，同时规定（）。

A．无论是以何种形式做出都必须要有对价才能有效

B．简式合同必须要有对价才能有效

C．签字蜡封合同必须要有对价才能有效

利用油膜法可粗略测定分子的大小，如图所示，其实验原理是将油滴滴到水面上，油滴会在水面上散开，形成单分子油膜．若把分子看成球形，先测出油滴的体积V，再测出油膜的面积S，就可粗略估算出油分子的直径d=______．在做“用油膜法估测分子大小”的实验时，油酸酒精溶液的浓度为每1000ml溶液中有纯油酸1ml，用注射器测得1mL上述溶液有200滴，把一滴该溶液滴入盛水的表面撒有痱子粉的浅盘里，待水面稳定后，测得油酸膜的近似轮廓如图所示，图中正方形小方格的边长为1cm，则每一滴油酸酒精溶液中含有纯油酸的体积是______mL，油酸膜的面积是______cm²．根据上述数据，估测出油酸分子的直径是______m．

阅读理解。

     From the beginning of human history, wild animals provided food, clothing and sometimes medicine.

We may not depend as much on wild animals now. But we hear about them every day. Americans use the

names of animals in many ways. Automobile manufacturers and gasoline companies especially like to use

big cats to sell their products. They like lions, tigers and wildcats. When Americans say wildcat, they usually

mean a lynx, an ocelot or a bobcat. All these cats attack quickly and fiercely. So wildcats represent something

fast and fierce.

     An early American use of the word wildcat was quite different. It was used to describe members of

Congress who declared war on Britain in 1812. A magazine of that year said the wildcat congressmen went

home. It said they were unable to face the responsibility of having involved their country in an unnecessary

war.

     Wildcat also has been used as a name for money in the 1800s. At that time, some states permitted banks

to make their own money. One bank in the state of Michigan offered paper money with a picture of a wildeat

on it. Some banks, however, did not have enough gold to support all the paper money they offered. So the

money had little or no value. It was called a wildcat bill or a wildcat bank note. The banks who offered this

money were called wildcat banks. A newspaper of the time said those were the days of wildcat money. It

said a man might be rich in the morning and poor by night.

     Wildcat then was also used for an oil well or gold mine that had almost no oil or gold in it. Dishonest

developers would buy such property. Then they would sell it and leave town with the money. The buyers

were left with worthless holes in the ground. Today, wildcat oil wells are in areas that are not known to have

oil.

1. What is the main idea of the passage? [ ]

A. Wildcats and their stories.

B. Wildcats and their characters.

C. Varieties of animal species.

D. Relationship between animals and humans.

2. From the passage we can know that _____. [ ]

A. wildcats represent the state of Michigan

B. the use of wildcat was not always the same

C. wildcats are the best friend of human beings

D. honest developers never buy wildcat oil wells

3. The underlined words "a lynx, an ocelot or a bobcat" in Paragraph l may refer to "_____". [ ]

A. gasoline companies

B. automobile manufacturers

C. names of wildcats

D. brands of automobile

4. Which of the following would people like to have or trust according to the passage? [ ]

A. Wildcat congressmen.

B. Wildcat oil wells.

C. Wildcat banks.

D. Wildcat cars.

5. It can be inferred that during the days of wildcat money _____. [ ]

A. people couldn't buy anything with the money

B. people didn't know how to save money

C. the rich invested too much on oil wells

D. people complained and suffered a lot

泌尿系结石血尿特点是

A．无痛性全程肉眼血尿

B．终末血尿伴膀胱刺激征

C．初始血尿

D．疼痛伴血尿

E．血红蛋白尿

在实现ERD与过程模型同步的技术中，（）是一种较为常见的技术。

A.用例图

B.数据流图

C.功能／实体矩阵

D.微规格说明