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【单选题】
食品香精菠萝酯的生产路线如下： 下列叙述错误的是（  ）
A.
苯氧乙酸中的所有碳原子不一定在同一个平面上
B.
菠萝酯的分子式为C 11 H 12 O 3
C.
步骤⑵中烯丙醇(CH 2 =CHCH 2 OH)的核磁共振氢谱上有三种类型的氢原子吸收峰
D.
苯氧乙酸和菠萝酯均可与NaOH溶液发生反应
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【简答题】在三相五线制供电系统中,一根相线与另外一根相线之间的电压称为 ____ 。通常国内该电压为 ____ V。一根相线与零线之间的电压称为 ____ 。通常国内该电压为 ____ V。
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【单选题】Though ______money ,his parents managed to send him to university.
A.
lacked
B.
lacking of
C.
lacking ( vt.)
D.
lacked in
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【单选题】—Would you like me to go to the dentist with you? —No, you______with me.
A.
need not to go
B.
need not go
C.
do not need go
D.
not need go
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【单选题】I want to go to the cinema, but you _____ with me.
A.
need not to go
B.
do not need go
C.
need not go
D.
need go not
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【判断题】门关闭后,门扇之间及门扇与立柱、门楣和地坎之间的间隙应尽可能小。
A.
正确
B.
错误
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【单选题】I want to go to the dentist, but you ______ with me.
A.
need not to go
B.
do not need go
C.
need not go
D.
need go not
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【单选题】_____ confidence led to his failure in the interview. [     ]
A.
Lacking of
B.
Lack for
C.
Lacking in
D.
Lacking
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【判断题】层门关闭后,门扇之间及门扇与立柱、门楣和地坎之间的间隙为12mm。
A.
正确
B.
错误
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【单选题】载货电梯的层门关闭后,门扇之间及门扇与立柱、门楣和地坎之间的间隙应不大于( )mm。
A.
6
B.
10
C.
8
D.
12
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【单选题】Though _______ money, his parents managed to send him abroad.
A.
lacked
B.
lacking of
C.
lacking
D.
lacked in
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【简答题】在三相五线制供电系统中,一根相线与另外一根相线之间的电压称为 ____ 。通常国内该电压为 ____ V。一根相线与零线之间的电压称为 ____ 。通常国内该电压为 ____ V。
查看完整题目与答案
【单选题】Though ______money ,his parents managed to send him to university.
A.
lacked
B.
lacking of
C.
lacking ( vt.)
D.
lacked in
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【单选题】—Would you like me to go to the dentist with you? —No, you______with me.
A.
need not to go
B.
need not go
C.
do not need go
D.
not need go
查看完整题目与答案
【单选题】I want to go to the cinema, but you _____ with me.
A.
need not to go
B.
do not need go
C.
need not go
D.
need go not
查看完整题目与答案
【判断题】门关闭后,门扇之间及门扇与立柱、门楣和地坎之间的间隙应尽可能小。
A.
正确
B.
错误
查看完整题目与答案
【单选题】I want to go to the dentist, but you ______ with me.
A.
need not to go
B.
do not need go
C.
need not go
D.
need go not
查看完整题目与答案
【单选题】_____ confidence led to his failure in the interview. [     ]
A.
Lacking of
B.
Lack for
C.
Lacking in
D.
Lacking
查看完整题目与答案
【判断题】层门关闭后,门扇之间及门扇与立柱、门楣和地坎之间的间隙为12mm。
A.
正确
B.
错误
查看完整题目与答案
【单选题】载货电梯的层门关闭后,门扇之间及门扇与立柱、门楣和地坎之间的间隙应不大于( )mm。
A.
6
B.
10
C.
8
D.
12
查看完整题目与答案
【单选题】Though _______ money, his parents managed to send him abroad.
A.
lacked
B.
lacking of
C.
lacking
D.
lacked in
查看完整题目与答案