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【单选题】
以下哪个不是生物反应过程的特点?
A.
污染小
B.
能耗小
C.
反应机理复杂
D.
稳定性好
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参考答案:
举一反三
【单选题】用于衡量柱效的参数
A.
峰高
B.
峰面积
C.
峰宽
D.
调整保留时间(t’R)
E.
峰位
【单选题】用于衡量柱效的参数
A.
峰高
B.
峰面积
C.
峰宽
D.
调整保留时间
E.
峰位
【单选题】The teacher told his student to make the most of the opportunities ___hand.
A.
in
B.
of
C.
at
D.
on
【单选题】诗经是先秦作品吗?
A.
B.
不是
【单选题】1,3—戊二烯经臭氧化,在锌存在下水解,可得到哪一种产物?
A.
HCHO + OHCCHO+CH2CHO
B.
HCHO + HOOCCH2COOH
C.
HCHO + CH3COCHO
D.
CH3COCHO + CO2 + H2O
【单选题】The teacher told his students to make the most of the opportunities ( ) hand.
A.
on
B.
at
C.
to
D.
by
【单选题】The teacher told his class that the light ___ faster than the sound.
A.
travel
B.
traveled
C.
travels
【单选题】The teacher told his students that the earth___________round like a ball.
A.
be
B.
is
C.
had been
D.
Was
【单选题】1,3-戊二烯经臭氧化,在锌存在下水解,可得到哪一种产物?
A.
HCHO + OHCCHO+CH3CHO
B.
HCHO + HOOCCH2COOH
C.
HCHO + CH3COCHO
D.
CH3COCHO + CO2 + H2O
【简答题】用于衡量柱效的参数
参考解析:
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