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搜题
【单选题】
催化a—氨基酸和a—酮酸之间氨基转移的酶称为
A.
羧基转移酶
B.
氨基转移酶
C.
脱氢酶
D.
氧化酶
E.
激酶
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举一反三
【单选题】The man went to prison, but the two boys______with a warning.
A.
took off
B.
got off
C.
kept off
D.
set off
【单选题】从图2—1所示灰铸铁件上的不同部位切取l、2、3号标准拉力试棒。经测试后,三者的抗拉强度应符合( )。
A.
σ3>σ2>σl
B.
σ1>σ2>σ3
C.
σl>σ2<σ3
D.
σl=σ2=σ3
【单选题】They kept trying, and their efforts finally _______.
A.
make it
B.
paid off
C.
are made it
D.
are paid off
【简答题】请根据视频内容回答word文档中的问题。 C1 Pass 5 Celebrating St. Lucia's Day.mpg Celebrating St. Lucia's Day.docx
【单选题】All the mobile phones must be ______ during the meeting. [     ]
A.
kept fit
B.
kept quiet
C.
kept off
D.
kept away
【单选题】Brian kept __ off the pizzas, so he lost the race. [     ]
A.
to fall
B.
fell
C.
falling
D.
fall
【单选题】He will stop showing off, if no notice _____ of him.
A.
is taken
B.
will be taken
C.
takes
D.
has taken
【单选题】The rain has stopped. Please _____ your umbrellas. [     ]
A.
put away
B.
put off
C.
kept up
D.
kept on
【单选题】He had something urgent to do , so he asked___. A.have a day off B.having a day off C.to have a day off D.to have a day away
A.
have a day off
B.
having a day off
C.
to have a day off
D.
to have a day away
【单选题】He took off his coat he felt hot.
A.
because
B.
as
C.
if
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