《广东新语》中“以白米浸至半月，入白粳饭其中，乃春为粉，以猪油润之，鲜明而薄以为外，

质量为m=60 kg的人站在质量为M=100 kg的小车上，一起以v=3 m/s的速度在光滑水平地面上做匀速直线运动，若人相对车以u=4 m/s的速率水平向后跳出，则车的速率变为_______。

读图，完成下列各题。     

小题1:图示时间，下列城市风力最大的是：

A．乌鲁木齐

B．沈阳

C．广州

D．武汉小题2:此时：                      

A．太原位于高压区内，天气晴朗，气温较低

B．沈阳处在冷锋控制下、大风、降温

C．海口受来自海洋气流影响，为阴雨天气

D．武汉因受低气压控制，气温低小题3:关于①—④四地点风向的判断，正确的是：   

A．①③的风向相反

B．②④的风向相近

C．③吹西北风

D．④吹西北风、

Long ago, in days of the Roman Empire, people used to believe a god of farmings called “Saturn”. They believed that Saturn could make the weather good or bad, and that he had the power to control how much rain would fall.

Before a Roman farmer would plant his fields, he would try to get Saturn to give him good weather. He believed that if he killed an animal for Saturn, that would make Saturn happy. Then Saturn would make sure that the weather was good.

Not only did the people name a planet after Saturn but they also name a day of the week after him. They called this day “Saturni dies”, Latin words which mean “day of Saturn”. In English those words became Saturday.

6. What was Saturn believed to be in charge of?

A. Rainfall.    B. The power of nature.   C. Farming.    D. Days in a week.

7. Why did a Roman farmer kill an animal before planting his fields?

Because      .

A. killing an animal would bring him good luck

B. Saturn enjoyed eating animals

C. Saturn was happy to see animals being killed

D. he wanted to please Saturn so that Saturn would make the weather good for his planting

8. Which of the following is NOT TRUE?

A. Saturn is also the name of planet.

B. The Roman people used to believe Saturn to be their god.

C. Saturn was named for the last day of the week.

D. Saturn had three meanings.

9. What’s the aim of the author in writing this passage?

A. How the Romans worshipped (崇拜) Saturn.

B. Why the Romans believed in Saturn.

C. The different meanings of the word Saturn.

D. How Saturday got its name.

润滑系包括机油泵、集滤器、机油粗、细滤清器、散热器、润滑油道以及（）和传感器等辅助器件。

A、油底壳

B、限压阀

C、机油管

D、机油压力表

平整度是重要的检测项目，故应采用数理统计的方法进行评定。( )