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【简答题】
The computers changed our lives in the 1980s, the Internet changed our lives in the 1990s, and the robots will change our lives in the new century. Do you think there will be robots in people’s homes? It’s not a dream that every home will have a robot. Now, robots are not only able to help people do the housework, they can also help the doctors do the difficult operations, play chess with people, play the piano and so on. A new cooking robot is used in Beijing. It can cook all the dishes on the menu, you only need to wait two to four minutes, in the future, the robot will be a nurse, a security guard, or a partner in your life. Experts(专家) believe robots will be used everywhere from the industrial( 工业的) robots to service robots. In the future, robots will become part of the family, and provide else service for people. We all look forward to the new robot age. 小题1: changed our lives in dm 1990s. A. The robots         B. The compilers     C The TV sets      D. The Interact 小题2: According to the passage, we know that a new cooking robot is being used in . A.the future B.Beijing C.many countries D.many families 小题3:What can the robots do now? A. They can help people do the housework. B. They can help the doctor do the difficult operations C. They can play chess with people. D. A, B and C. 小题4:Experts believe robots will be used . A.only in a hospital B.only in a filmily C.only in a factory D.everywhere 小题5:Which is the best title(标题) of the passage? A.The computers changed our lives B.Robots can cook C.Robots are coming D.Robots will be doctors
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【单选题】关于氢键,下列说法正确的是
A.
甲硫醇(CH 3 SH)比甲醇的熔点低的原因是甲醇分子间易形成氢键
B.
氯化钠易溶于水是因为形成了氢键
C.
氨易液化与氨分子间存在氢键无关
D.
H 2 O是一种非常稳定的化合物,这是由于氢键所致
【简答题】用钢楔劈物,接触面间摩擦角为φm,钢楔重力不计。劈入后欲使楔不滑出,钢楔两个平面的夹角α(如图所示)应为()。
【单选题】用钢楔劈物,接触面间摩擦角为φm,钢楔重力不计。劈入后欲使楔不滑出,钢楔两个平面的夹角α(如图所示)应为( )。
A.
B.
C.
【单选题】17,下列导游提醒游客做好中鲁防护的工作中,错误的是
A.
涂抹防晒霜
B.
戴太阳镜
C.
穿化纤品类服装
D.
穿白色、浅色衣服
【单选题】下列分子间易形成氢键的是( )
A.
H2S
B.
HCl
C.
NH3
D.
CH4
【单选题】How do the students demonstrate that they really enjoy professor Hawl's classes?
A.
They complete all their assignments.
B.
They study hard for his tests.
C.
They compete for the best seats in the class.
D.
They read all his books.
【单选题】如图所示,用钢楔劈物,接触面间的摩擦角为 ,楔重不计。 劈入后欲使楔不滑出,钢楔两个平面间的夹角应为
A.
≥ /2
B.
≤ /2
C.
≥2
D.
≤2
【单选题】实际工作中点钞至少应该清点( )遍金额相等,保证清点无误
A.
一遍
B.
两遍
C.
三遍
D.
四遍
【单选题】下列分子间易形成氢键的是
A.
H 2 O
B.
HCl
C.
H 2 S
D.
CH 4
【简答题】如图所示,用钢楔劈物,接触面间的摩擦角为 。劈入后欲使楔不滑出,问钢楔两个平面间的夹角应该为多大?楔重不计。
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