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【单选题】
合蕊柱是兰科最重要的特征之一。( )A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【判断题】Early settlers came to the US only for political reasons and they built their own lives, their own communities and their own economy.
A.
正确
B.
错误
【多选题】What are the reasons for the rapic development of Indian economy?
A.
Improvement of economic structure
B.
rapid development of service industry
C.
growth in consumption
D.
foreign investment
【单选题】What do the letters K, L, M, and N, in terms of an atom's electron configuration, refer to?
A.
The principal quantum number
B.
The orbital quantum number
C.
The magnetic quantum number
D.
The spin quantum number
【单选题】Since calculators were introduced, they _________ to be useful tools for people weak in math.
A.
proved
B.
will prove
C.
have proved
D.
are proving
【简答题】Speaking exercise: Student A: Marketing Manager Student B: Visitor B is interested in the new products of A's company. He is planning to meet A in his office. B makes an appointment with A and later c...
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