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【单选题】
在下列氧化还原体系中,哪一种标准还原电位最高()
A.
氧化型CoQ/还原型CoQ
B.
Fe 3+ Cyta/Fe 2+
C.
Fe 3+ Cytb/Fe 2+
D.
NAD + /NADH
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【单选题】( )29. — ____ ? — He can sing English songs
A.
Can he sing English songs
B.
Does he like English songs
C.
What can he do
D.
What does he do
【单选题】When I handed the report to John,he said that George was the person______.A.to sendB.for sending
A.
29. When I handed the report to John,he said that George was the person______. A.to send
B.
for sending
C.
to send it to
D.
for sending it to
【简答题】编写程序实现 三色球问题。若一个口袋中放有12个球,其中有3个白色球,3个红色球,6个黑色球,从中任取8个球,问共有多少种不同的颜色搭配。
【单选题】He was busy preparing a speech , only _______ once in a while to rise from the table for a tea .
A.
29. He was busy preparing a speech , only _______ once in a while to rise from the table for a tea . A.stopping
B.
to stop
C.
to have stopped
D.
having stopped
【单选题】( 北京卷 )29. As soon as he comes back, I’ll tell himwhen __________ and see him.
A.
you will come 
B.
will you come  
C.
youcome  
D.
do you come
【单选题】Can you say _____ certain when he will come here?
A.
at
B.
for
C.
with
D.
In
【单选题】Only ____ did she realize the stress he was_____.
A.
then; under
B.
when; on
C.
when; at
D.
then; with
【单选题】胃肠黏膜的损害因素,下列哪项不妥
A.
非甾体类药物
B.
吸烟
C.
过度精神紧张
D.
刺激性食物
E.
前列腺素
【单选题】三色球问题。若一个口袋中放有12个球,其中有3个红色的,3个白色的,6个黑色的,从中任取8个球,问共有多少种不同的颜色搭配? 代码如下,按要求在空白处填写适当的表达式或语句,使程序完整并符合题目要求。
A.
第9行: k=0; k<6; k++ 第11行: i + j + k==8
B.
第9行: k=0; k<=6; k++ 第11行: i + j + k==8
C.
第9行: k=0; k<=6; k++ 第11行: i + j + k <=8
D.
第9行: k=0; k<=6; k++ 第11行: i + j + k=8
【简答题】三色球问题。若一个口袋中放有 12 个球,其中有 3 个白色球, 3 个红色球, 6 个黑色球,从中任取 8 个球,问共有多少种不同的颜色搭配。
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