1.2002-5(1)
我感觉这句话应该是被动语态,是不是少了were
pig iron, wrought iron, and steel contain iron carbides made up of ---- of carbon.
a. amounts are different
b. different amounts that
c. different amounts
d. which amounts are different
2. 2002-5的29题选a还是b?
举报
第一题没错选c
2 当然是b
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