冲击振动的载荷，将形成瞬间极大的压强，故均应采用粘度（）的润滑油。 A.较大 B.较

第二节：语法填空（共10小题，每小题1.5分，满分15分）

阅读下面短文，根据上下文填入适当的词语，或使用括号中的词语的适当形式填空，并将答案填写在答题卡上标为31～40的相应位置。

The word addiction usually makes you think of alcohol or drugs,    31    in modern-day society we are seeing some new kinds of addictions. For example, some people are compulsive shoppers. Over the years, shopping has become    32    very common activity. Many people enjoy going to malls or stores more and more every day, but it’s more than a common hobby for some of them. They have turned    33    shopahilics. They are people    34     simply enjoy shopping and walking around spending without being able to stop doing it.    35   they don’t have enough money, they buy everything they want.

The question is: why do they have this addiction?   36    isn’t a specific answer. Some people go shopping when they are sad, worried, upset or lonely and they want to feel better. They use this activity as a way   37    forget their problems. Shopaholics say that they feel    38    important and better after they buy something. They     39     tend to have this addiction when they feel     40     (guilt). For example, a husband might buy very expensive presents for his family to try to make up for his lack of love for them.

一个运动物体，在第一次10秒内走4米，在第二次5秒内走2米，在第三次15秒内走6米，则可以肯定此物体一定是作了（　　）

A．匀速直线运动

B．变速直线运动

C．既有匀速直线运动，又有变速直线运动

D．条件不足无法确定

指挥了抗战以来取得最大胜利的一场战役的是（）

以下关于数学模型的描述，错误的是（）。

A.信号流图不是数学模型的图示

B.数学模型是描述系统输入、输出变量以及系统内部河变量之间的动态关系的数学表达式

C.常用的数学模型有微分方程、传递函数及状态空间表达式等

D.系统数学模型的建立方法有解析法和实验法两类

梭伦改革的解负令、罗马万民法和隋唐时期的科举制度，在历史上发挥的共同作用是（）

A.都加强了封建中央集权

B.都保护了自由民的私有财产

C.都促进了民主政治发展

D.都扩大了统治基础