因摩擦而使零件尺寸、表面形状和表面质量发生变化的现象称为（）。A、变形 B、断裂 C

根据短文内容和以下提示:1)首字母提示，2)语境提示，3)汉语提示，在每个空格内填入一个适当的英语单词。所填单词要求意义正确，拼写准确。

The Internet has become 小题1: p      of teenage life.

A new report on 3,375 students aged from 10 to 18 in seven Chinese cities 小题2:   （报导）that 38 percent of them believe they use the Internet often.

Most of them get useful information and 小题3:   (提高) their study by using the Internet, while some are not using it in a good way.

In order to help young people use the Internet in a good way, a textbook 小题4:   good Internet behavior has started to be used in some middle schools in Shanghai this term. The book uses many real 小题5:   （例子）to teach students all about good ways of using the Internet, and it gives useful 小题6: a     such as it’s good to read news or find helpful information about study.

Some students also make online friends. But if you are meeting an online friend, make sure your parents know. Teachers and parents all think the book is of 小题7:g     help. A teacher said the book would be a guide for teenagers 小题8:    using the Internet. She believes it will keep students 小题9:    from bad websites（网址）. “Many students are using the Internet without good guidance（指导）from their parents.” She said, “The book will teach students 小题10:     to be a good person in the online world.”

男，89岁。久病卧床，近日来冷汗自出，四肢厥逆，面色苍白。检查：血压60/35mmHg，听诊心音微弱。舌淡苔白，脉微欲绝。最佳选药是

A．肉桂

B．干姜

C．附子

D．细辛

E．吴茱萸

实验室用氯化钠固体配制1.00mol·L^-1的NaCl溶液0．5L，回答下列问题：

（1）配制上述溶液所需NaCl固体的质量为__________。

（2）请写出该实验的实验步骤 ①计算，②__________，③__________，④__________，⑤洗涤 ⑥

__________，⑦ 摇匀。

（3）所需仪器为：容量瓶（规格：__________）、托盘天平。还需要哪些玻璃仪器才能完成该实验，请写出：________________________________________。

（4）试分析下列操作对所配溶液的浓度有何影响。（填空：A---偏高．B---偏低．C---无影响，填序号） ①为加速固体溶解，可稍微加热并不断搅拌。在未降至室温时，立即将溶液转移至容量瓶定容。 __________；

②定容后，加盖倒转摇匀后，发现液面低于刻度线，又滴加蒸馏水至刻度。对所配溶液浓度的影响

__________；

③ 配制前容量瓶用水洗涤后未进行干燥处理__________；

④定容时俯视刻度线__________。

境内外币支付系统中，哪一级部门可以实时查询我行开设在结算行帐户余额？（）

A.支行

B.分行

C.省行

D.总行

在经济史上第一个建立政治经济学完整理论体系的是（）。

A.配第

B.斯密

C.李嘉图

D.斯图亚特.穆勒