Providing initial evidence that airport are a larger source of pollution than they were once believed to be, environmentalists in Chicago report that the total amount of pollutant emitted annually by vehicles at O'Hare International Airport is twice as much annually as is emitted by the motor vehicles in the Chicago metropolitan area.
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西西瓜 2014-10-20 19:24:10
如果改为as much annually as that emitted by the就对了，首先is看着就很多余，其次，最好补出来that。
christy0229 2014-05-22 23:31:41
比较
Benwant700 2014-09-07 21:10:22
Is多余；比较双方不明确，后面应用补出that；annually放在as…as结构中间成为比较双方共享的东西，造成与前面的annually重复。
viviensakura 2016-12-10 12:10:45
比较从句还原主语看正误，还原主语为the total amount of pollutant is emitted 而总量是不能被排放的
davisuperman 2016-12-10 11:41:19
比较从句主语省略，还原(the total amount of pollutant) is emitted, 总量被排放，语意不合理
小揪揪 2016-12-09 15:49:15
Is多余；比较双方不明确，后面应用补出that；annually放在as…as结构中间成为比较双方共享的东西，造成与前面的annually重复。
alva暖暖 2016-12-08 17:55:51
annually重复，我觉得is不多余吧，省略合不合适我也不知道
要考满分的晚琳儿 2016-10-24 15:45:36
1、twice(as much as)... 此选项错在第二个as后没有补出比较对象（可用that指代）。以及annually放在as...as之间，变成了共同的部分，和前面出现过的annully重复
yiyi11311 2016-10-15 20:38:49
is多余
ColdSheldon 2016-10-11 17:17:04
twice as much as that emitted by 比较对象就是两种 total amount twice as much as emitted by 比较对象就是 两种by
mozzmozzie 2016-08-04 11:39:47
多了个is，emitted是直接修饰pollutant的
SUNSHINE218 2016-08-03 10:50:52
annually 错误 as much as annully 表明一个属性是双方共享的 与前面的pollutant emitted annually重复了 倍数 (as much as)+sth. 是可以省略的 这里没有加sth 比较所指代的东西并不明确 is 又多余了
Egoyiyy 2016-03-18 16:16:25
没有和is 平行的 ， 前面是emitted. IS多余 annually放在as…as结构中间成为比较双方共享的东西，造成与前面的annually重复。
