在实际操作中，若浓硫酸溅到皮肤上，应迅速用（）擦去，不可用水冲洗。
参考答案：软布
In the third paragraph, "a dual function" refers to ______.
A．formal and informal
B．rewards and penalties
C．approval and disapproval
D．clarification and regulation
About____________of the books in the library are written in Chinese.
A．four fifth
B．four fifths
C．fuorth fifths
D．fourth fifth
