一道高中英语题。

A
表示倍数方法：

倍数+as +adj/adv + as
倍数 + 比较级
倍数 + the + 名词 + of (这里的名词往往表示长，宽，高，体积或数量等）

如：twice the length of
twice the size of
twice the amount of

B虽然从形式上看似正确，但是表示大两倍，应该用twice bigger than就可以了，而不是twice more than。
more than理解为 “多于,超过”。放在前面修饰。

答案选B
这里是“A + be + 倍数 + 计量形容词比较级 + than + B ”

倍数表达法：
 A + 谓语+倍数+the +n.(size/ height/ length……)+of B
 A + 谓语+倍数+as + abj. + as B
 A + 谓语+倍数+adj. 比较级+than B A + 谓语+adj. 比较级+than B+by+倍数
1).This square is twice the size of that one.
 This square is twice as large as that one.
 This square is once larger than that one.
2).This factory produced three times as many cars as they did 10 years ago.
3).He is 3 years older than I- He is older than I by 3 years

1.“A + be + 倍数 + as + 计量形容词原级 + as + B”。
This tree is three times as tall as that one.
这棵树是那棵树的三倍高。
His father is twice as old as he.
他父亲的年纪有他两倍大。
2.“A + be + 倍数 + 计量形容词比较级 + than + B ”
The Yangtze River is almost twice longer than the Pearl River.
长江差不多比珠江长两倍。
The dictionary is exactly five times more expensive than that one.
这本字典比那本恰好贵5倍。
3.“A + be + 倍数 + the + 计量名词 + of + B ”
The newly broadened square id four times the size of the previous one.
新扩建的广场是未扩建时的四倍大。
4.“The + 计量名词 + of + A + be + 倍数 + that + of + B ”
The size of the newly broadened square is four times that of the previous one.
新扩建的广场为以前的四倍大。
5.其它I‘m twice/ double his age. 我的年龄是他的两倍。
I‘ve paid five times the usual price for the stamp.
我出了5倍于往常的价格买这枚邮票。
The average income of the staff has been increased by 50 percent compared with last year.
与去年相比，该单位职工的收入增加了50%.
The price of TVs are twofold（ adj. 两部分的， 双重的） down over these years.
近几年来，电视机的价格下降了两倍。

选B。固定表达法，具体可百度“英语倍数表达法”，进入百度文库，里面有详细解释！
希望能帮到你哦O(∩_∩)O！

选A吧
句子意思是“这个房间比那个房间的两倍还大”， more than是“不止、以上”的意思 ，“more than twice”是这里表示不止两倍的意思，作为“A + be + 倍数 + 计量形容词比较级 + than + B ”这个结构中的“倍数”，也就是说more than 其实是用来修饰twice的。

全句意思：描述（解释）警察的工作并不是件容易的事。警察终究是集多个工作英语不常用了，帮你参考一下吧。 很难描述一个警察的工作。毕竟，一个警察