John is 180 centimeters tall,and his daughter is 90.So he is

选择B:as tall as
“是.的.倍”的英文结构是：倍数词 + as + 形容词/副词 + as ...,例：
This room is three times as big as that one.这个房间时那个房间的三倍大.
He runs twice as fast as his sister.他跑步是他姐姐的双倍快.
so...as...多用于否定句,表示“不如.",例：
He is not so tall as his sister.他不如他姐姐高.
much taller than 的意思是 “比.高得多”
less than的意思是：“少得多”

B
twice本身就有两倍的含义，所以排除C、D，它们是作为比较级的，更高、更低。
记住这个用法，以后考试会常考到的。

选择B
是。。。的。。。倍的英文结构是：倍数词 + as + 形容词/副词 + as ...,
He runs twice as fast as his sister. 他跑步是他姐姐的双倍快。
so...as...多用于否定句，表示“不如。。。", 例：
He is not so tall as his sister. 他不如他姐姐高。
much ta...