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【单选题】
异羟肟酸铁反应作用的基团是A.
酚羟基
B.
芳环
C.
甲氧基
D.
内酯环
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反馈参考答案：
举一反三
【单选题】Selon la légende, c'est qui a découvert le premier le café.
A.
un berger d'Éthiopie
B.
un berger d'Égypte
C.
un colon européen
【简答题】He first welcomed the new student and then explained college regulations. (go on)5．He first welcomed the new student and then explained college regulations. (go on)
【简答题】______ is 30% of 20.
【单选题】How old is the new student?
A.
Seventy.
B.
Seventy-eight.
C.
Eighty.
D.
Eighty-seven.
【简答题】A.Hell visit the exhibit after June. B.He visited the new student center several times. C.He wants to exhibit his work at the student center. D.He can visit the exhibit before it closes.
【简答题】3÷4= () 4 =12÷______=______：20．
【简答题】He first welcomed the new student and then explained college regulations. (go on)
【简答题】230×30______320×20．
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