下列说法中正确的是()
A:机械效率越高的机械做功越快
B:机械效率越高的机械做功越多
C:功率越大的机械做功越多
D:功率越大的机械做功越快
Give me a chance, ________ I'll give you a wonderful surprise.
如图是模拟膈肌的运动示意图,请据图完成下列问题:
Why are you sad?
Because I____(失去了我的猫).
下列各句中,加线的成语使用恰当的一句是( )
阅读下面的一段话,判断正误。
Hi! I'm John. Come here, my friends! Look at my dog. It has two big eyes. It's very cute. This is my cat, Mimi. It's fat. It's two years old. I have six fish. Oh! Mimi likes(喜欢) my fish. I have a bird, Polly. It's beautiful!