一本书,看了13,这句话可以理解为:一本书,看的页数是总页数的13,
是把这本书的总页数看成了单位“1”;
故答案为:这本书的总页数.
I've decided to go to London next weekend. I was wondering________ you could gowith me.
A.if
B.when
C.that
D.where
水表最大允许误差是多少?