元器件引线经过弯曲成形，表面镀层剥落不应大于引线直径的（）。
A.1/10
B.1/5
C.1/3
D.1/2
参考答案：A
—I feel stressed in my study from time to time. I don't know what to do.
—_________.[ ]
A. You should keep relaxed.
B. What about keeping your worries to yourself?
C. Why not ask the youth workers for advice?
D. You'd better pay no attention to your study.
菊花散4功效与作用
