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【判断题】
作匀速圆周运动的质点,其质量m,速率v及圆周半径r都是常量。虽然其速度方向时时在改变,但却总与半径垂直,所以,其角动量守恒。( )A.
正确
B.
错误
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举一反三
【单选题】This amplifier circuit is a very common configuration used to amplify the difference in voltage between two input signals; in this case input 1 and 2. What is this amplifier called?
A.
Darlington connection amplifier.
B.
Common emitter amplifier.
C.
Differential amplifier.
D.
Push-pull amplifier.
【单选题】Which of the following statements signals a transition in the lecture?
A.
So when you meet with employees on a one-on-one basis like this, you have an opportunity to show them that their thoughts and ideas matter to you.
B.
So how do you do that? Well, there are a lot of ways.
C.
But a successful performance review should be an exchange of information between a supervisor and an employee.
D.
The previous supervisor lacked effective leadership skills, and as a result, everyone suffered.
【简答题】内分泌系统是体内 和分散存在于某些组织中的内分泌细胞组成的一个体内信息传递系统,它与神经系统密切联系,相互配合,共同调节机体的各种功能活动,维持内环境相对稳定
【多选题】SARS相应处理方式正确的有（）。
A.
不是“SARS”，进入正常医疗程序
B.
不像“SARS”，医学观察
C.
疑似“SARS”，留院观察，单人单间病室
D.
做临床诊断，送定点医院，单人单间病室
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