进行性脊肌萎缩的首发症状最常见为（）。
A.一手或双手小肌肉萎缩、无力
B.下肢肌肉萎缩、无力
C.肌张力降低
D.腱反射亢进
E.大小便失禁
参考答案：A
I ____ my father ____ and he did so.
A．advised; to stop smoking
B．tried to persuade; to give off smoking
C．persuaded; to give up smoking
D．suggested; to stop to smoke.
如果傍晚看到东方出现虹，表明天气将（）。
A、变坏
B、变好
C、有雨
D、刮风
