外圆车刀的切削部分结构() A.前刀面 B.后刀面 C.付后刀面 D.主切削刃

题型:多项选择题

问题:

外圆车刀的切削部分结构()

A.前刀面

B.后刀面

C.付后刀面

D.主切削刃

考点:金属工艺学机械加工机械加工题库
题型:多项选择题

阅读理解。

     This is News on the Hour, Ed Wilson reporting. The president and First Lady will visit Africa on a good will tour in May. They plan to visit eight African countries.

     Reports from China say the Chinese want closer ties between China and the U.S. and Western Europe. A group of top Chinese scientists starts its ten-nation tour next month.

     Here in Miami, the mayor is still meeting with the leader of the Teachers’ Union to try to find a way to end the strike. City schools are still closed after two weeks. In news about health, scientists in California report findings of a relationship between the drinking of coffee and the increase of heart diseases among women. According to the report in the American Medical Journal, the five-year study shows that: women who drink more than two cups of coffee a day have a greater chance of having heart disease than women who do not.

     In sports, the Chargers lost again last night. The BBS beat them 1 to nothing. The Wingers had better results. They beat the Rifles 7 to 3.It was their first win in their last five months.

That’s the news of the hour. And now back to more easy listening with Jan Singer.

1. To improve the ties between China and the U.S. and Western Europe______.

A. some Chinese scientists will visit U.S. and Western Europe

B. China will send some scientist to visit the U.S. only

C. China has expressed its strong wishes.

D. China has given many reports to improve the ties

2. From the news in Miami we know______.

A. peaceful way will soon be found

B. the teachers’ strike will last long

C. students can’t go to school with the classroom tightly closed

D. students haven’t been to school for two weeks

3. The news about health tells us that______.

A. no one should drink more than two cups of coffee a day

B. women’s heart disease has a lot to do with their drinking coffee

C. no heart disease will be found if people don’t drink coffee

D. the more coffee people drink, the more chance they’ll get to have heart disease

4. From the last news we do NOT know______.

A. the results of the two matches

B. the Wingers played the Rifles

C. the number of the teams which played last night

D. how many times the Wingers has lost in the past five months

5. The passage is probably from______.

A. a radio station

B. a magazine

C. a Medical Journal

D. a newspaper

题型:多项选择题

人造地球卫星在距地球表面高度等于地球半径3倍处做匀速圆周运动.已知地球半径为R,地球表面的重力加速度为g,求:

(I)卫星的线速度;

(2)卫星围绕地球做匀速圆周运动的周期.

题型:多项选择题

保证担保的范围包括主债权及利息、违约金、损害赔偿金和实现债权的费用。()

题型:多项选择题

用50N的力拉一个质量为10kg的物体在水平地面上前进,拉力与水平方向夹37°角斜向上.若物体前进了10m,拉力F做的功W1=______,重力G做的功W2=______.如果物体所受的阻力为其重力的0.1倍,则物体克服阻力做功W3=______,总功W=______.(sin37°=0.6,cos37°=0.8,g取10m/s2

题型:多项选择题

下列哪些属于一般情况下的决策:()

A.通航条件发生变化;

B.码头拥挤;

C.A.B都不是;

D.都是。

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