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【单选题】
青饲料文火焖煮产生的有毒物质是(2013 真题下21)A.
硝酸盐
B.
亚硝酸盐
C.
氢氰酸
D.
乳酸
E.
碳酸
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反馈参考答案：
举一反三
【单选题】Which bills should be printed?
A.
The blue ones.
B.
The green ones.
C.
The red ones.
D.
The black ones.
【单选题】— _____ shoes do you want? — The green _____. [ ]
A.
What, one
B.
What, ones
C.
Which, one
D.
Which, ones
【简答题】外部中断INT0的入口地址是( )。
【单选题】What kind of neutrinos would be most useful to astronomers?
A.
Ones which have no electric charge, or little mass.
B.
Ones which are created artificially in the laboratory.
C.
Ones which can free themselves from the control of matter.
D.
Ones which come through a long distance of time and space.
【单选题】It is wise of you to well-trained workers untrained ones in the assembly line. [ ]
A.
substitute; for
B.
substitute; with
C.
replace; by
D.
replace; with
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