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【单选题】
创造是建立在()的基础上来制造新事物A.
理论
B.
传统
C.
创新
D.
实践
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举一反三
【单选题】What is said about Europan society in the passage?
A.
It is getting closer to American-style. capitalism.
B.
It has limited consumer's choice despite a free market.
C.
It is being threatened by irresistible privatization.
D.
It has fostered the trend towards small families.
【单选题】What does the recent poll show?
A.
It is getting more difficult for a woman to find her husband.
B.
It is getting increasingly difficult to start a familyl.
C.
It is getting more difficult for a man to find his wife.
D.
It is getting increasingly difficult to develop an intimate relationship with your spouse.
【简答题】炔烃的分子结构中含有 ,炔烃的通式为 。
【单选题】My toothache me. I thought it was going away, but it is getting worse now.
A.
kills
B.
is killing
C.
has killed
D.
killed
【单选题】炔烃的通式为
A.
C n H 2 n (n≥2)
B.
C n H 2 n+2 (n≥2)
C.
C n H 2 n-6 (n≥6)
D.
C n H 2 n-2 (n≥2) 。
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