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【单选题】
下列黄酮类酸性最强的是A.
7-OH黄酮
B.
4′-OH黄酮
C.
3′，4′-二OH黄酮
D.
7，4′-二OH黄酮
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举一反三
【简答题】Java主要有两种类型的数据,一是基本数据类型,另一个是___类型.
【单选题】In the areas of use of (1) landmine removal , (2) third world debt, (3) human rights, ( 4 ) fair trade and (5) youth poverty, which areas does the bank get involved in?
A.
(1)(3)(4)(5)
B.
(1)(2)(4)(5)
C.
(1) (2)(3)(4)
D.
(2)(3)(4)(5)
【单选题】In the areas of use of (1) landmines, (2) third world debt, (3) human rights, (4) fair trade and (5) youth poverty, which areas does the bank get involved in?
A.
(1)(3)(4)(5)
B.
(1)(2)(4)(5)
C.
(2)(3)(4)(5)
D.
(1)(2)(3)(4)(5)
【单选题】The use of chemicals in almost all areas of life has become a commonplace phenomenon. There is growing evidence, however, that chemicals in the environment, including pesticides, may contribute to Som...
A.
scientists are also concerned with the effects of pesticides on animals
B.
cancer is the worst effect of the pesticides
C.
most or all of the dangerous effects of pesticides are now known
D.
the chemicals may also cause these effects in humans
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