皮皮学,免费搜题
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【简答题】
A.To study animal behavior. in the wild. B.To increase the public's understanding of endangered species. C.To prepare endangered species for life in the wild. D.To breed animals to sell to zoos.
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皮皮学刷刷变学霸
举一反三
【单选题】苯环上哪种取代基存在时,其芳环质子化学位移最大
A.
—CH2CH3
B.
—OCH3
C.
—CH=CH2
D.
—CHO
【单选题】苯环上哪种取代基存在时,其芳环质子化学位移最大
A.
-C2H5
B.
—OCH3
C.
—CH=CH2
D.
—CHO
【单选题】小明每半年末存款1万元,年利率12%,按季度复利计息,问第5年年末本息和是多少?下列选项中正确的是( )。
A.
24.87万
B.
25.87万
C.
26.87万
D.
27万
【单选题】苯环上哪种取代基存在时,其芳环质子化学位移值最大
A.
–CH 2 CH 3
B.
–OCH 3
C.
–CH=CH 2
D.
-CHO
【单选题】I’ll show you _______.
A.
what to do
B.
to do what
C.
how to do
D.
to do how
【单选题】The oil sludge is burnt in the ______onboard.I’ll show you the ashes.
A.
boiler
B.
main engine
C.
auxiliary engine
D.
incinerator
【单选题】苯环上哪种取代基存在时,其芳环质子化学位值最大()
A.
–CH 2 CH 3
B.
–OCH 3
C.
–CH=CH 2
D.
-CHO
【单选题】The oil sludge is burnt in the ______onboar
A.
I’ll show you the ashes.
B.
boiler
C.
main engine
D.
auxiliary engine
E.
incinerator
【单选题】. 苯环上哪 种取代基存在时,其芳环质子化学位移值最大()
A.
–CH 2 CH 3
B.
–OCH 3
C.
–OH
D.
-NO 2
E.
-CH 3
【单选题】I’ll show you a market ________ you may buy all ________ you need.
A.
in which ; /
B.
which ; that
C.
where ; which
D.
that ; that
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