一列简谐横波在x轴上传播,在t1=0和t2=0.05s时刻,其波形图分别用如图所

题型:计算题

问题:

一列简谐横波在x轴上传播,在t1=0和t2=0.05s时刻,其波形图分别用如图所示的实线和虚线表示,求:

(1)这列波可能的波速____________;

(2)若波速为280m/s,那么波的传播方向向左还是向右.

考点:波的图像
题型:计算题

用括号内所给词的适当形式填空(每空不限一词)。

1.When I saw this photo, I _____ (think)of my uncle.

2. The patient (病人) feels much _____ (well) today.

3. We won't go to the park if it _____ tomorrow. (rain)

4. Do you think Rose is _____ (pretty) of her three sisters?

5. Remember _____ (not make) much noise in the reading room.

6. My mother cooks very _____ (taste) meals.

7. We have a great time _____ (play) softball after school.

8. They were the _____ (hero) of the World War II.

9. Helen asked _____ (she), "What will I be in the future?"

10. Lin Tao goes to the country to see his grandparents _____ (two) a month.

题型:计算题

《强化车门安全整治考核措施》规定,累计发生两次不检查所负责车门的,责任人()。

A.考核200元

B.考核300元

C.待岗一个月

D.待岗三个月

题型:计算题

Visual FoxPro中支持两种类型的菜单,分别是( )。

A.条形菜单和弹出式菜单

B.条形菜单和下拉式菜单

C.弹出式菜单和下拉式菜单

D.复杂菜单和简单菜单

题型:计算题

本期利润是一个能够全面反映基金在一定时期内经营成果的指标。 ( )

题型:计算题

飞机抽油时,燃油是通过燃油系统的线路抽出()

A、供油总管经抽油活门进入加油总管

B、加油总管经抽油活门进入抽油管

C、供油总管经放油活门进入放油管

D、供油总管经应急放油口

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