机电设备的功率越大，则机电效率（）。
A.越高
B.难以确定
C.越低
D.恒定
参考答案：B
M. Can I help you?
W- Yes, please. 小题1: . I want to give her a gift, but I don’t know what to buy.
M.. Maybe you can buy her some flowers.
W. Great ! 小题2: ?
M. I think carnations (康乃馨) are OK. They stand for beauty and also show your
love and respect to your mother.
W: 小题3: ?
M: Twenty yuan a bunch (束).
W. OK. 小题4: . Here’ s the money.
M. Happy birthday to your mother!
W:小题5: .
你在单位中通过竞争上岗，取代了你以前的领导，他从原来你的上级变成了你的下级，你如何和他共事，共同开展工作？
