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【单选题】
下列羰基化合物中，哪一个与给出的MS谱图相符【图片】A.
CH3COCH2CH2CH2CH3
B.
CH3CH2COCH2CH2CH3
C.
CH3COCH(CH3)CH2CH3
D.
CH3COCH2CH(CH3)CH3
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举一反三
【单选题】The shop offers products that range ________ inexpensive to very expensive.
A.
between
B.
from
C.
among
D.
along
【单选题】If a shirt is $ 100, and the shop offers you a 30% discount, how much will you pay for it?
A.
$50
B.
$70
C.
$30
D.
$15
【单选题】以下关于维生素K1的说法错误的是
A.
静注过快可出现面部潮红、 出汗、胸闷、支气管痉挛等
B.
维生素K1，属于脂溶性维生素K， 是参与肝内凝血酶原合成的必需物质
C.
与双香豆素类口服抗凝剂合用， 作用加强。
D.
严重肝脏疾患或肝功不良者禁用
【单选题】If the shirt is $ 50, and the shop offers you a 50% discount, how much will you pay for it?
A.
$ 100
B.
$ 25
C.
$ 150
D.
$ 50
【简答题】苏格拉底、柏拉图试图通过神学转换，确立一种新的神学，这是什么神学？
【简答题】What kind of right do you have if the shop owner offers to replace the faulty article? You have the right to __________and ask for a refund.
【单选题】The shop offers ______ of hats and shoes.
A.
a large choice
B.
a large choose
C.
large choice
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