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4. Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicles powered by natural gas emit less of certain pollutants than those burning gasoline or diesel fuel. (C-p8-16)
我觉得怎么少了一个DO
应该是than do those buring g or d fuel?
NN求教.这是主语比较啊!
还有一句
3. In addition to having more protein than wheat does, rice has protein of higher quality than that in wheat, with more of the amino acids essential to the human diet. (B-p106-19)
为什么冒出来一个in?可以解释下结构吗?(此句是归在宾语比较里面的) |
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