计算
[10-(0.2+6.37)]×0.5=____
A、B、C、D四个集气瓶中分别充满了Cl2、O2、H2、HCl四种气体中的一种。A瓶中的气体是黄绿色;C和A中的气体混合见光会爆炸;将D瓶的瓶盖打开,在潮湿空气中会出现白雾。根据以上现象判断各瓶中的气体分别是:
a.____;b.____;c.____;d.____。
He is always ____ ____ ____ ____ others.
— How many apples did you pick when you were on the farm?
— I picked _______ apples than any other student in my class.