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【单选题】
下列有关基因控制蛋白质合成的叙述，正确的是（）A.
一个密码子只决定一种氨基酸，一种氨基酸只由一种tRNA转运
B.
DNA转录和翻译的原料分别是核糖核苷酸和氨基酸
C.
该过程需要有三个高能磷酸键的ATP提供能量
D.
该过程一定遵循碱基互补配对原则，即A一定与T配对，G一定与C配对
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【单选题】The guide told us that he would organize some business men abroad＿＿＿next week.
A.
some time
B.
sometime
C.
some times
D.
sometimes
【简答题】根据PPT回答播种式拣货的优缺点。
【单选题】______ he told us is the news _______ China has got 32 gold medals in the 28th Olympic Games in Athens, _________, of course, made the nations feels very excited.
A.
What; which; which
B.
That; that; which
C.
What; that; which
D.
That; that; what
【单选题】The teach told us that Christmas ______ on December 25th.
A.
is
B.
was
C.
will be
D.
would be
【单选题】After all of us finished our homework, the teacher told us _________at once.
A.
to hand it in
B.
hand them in
C.
to hand them out
D.
hand it out
【单选题】It can be inferred from the passage that, in the course of a heating season, the heating capacity of a heat pump is greatest when ______.
A.
heating is least essential
B.
electricity rates are lowest
C.
its compressor runs the fastest
D.
outdoor temperatures hold steady
【单选题】We were greatly amused by ________.
A.
what you have told us
B.
which you had told us
C.
what you told us
D.
that you told us
【单选题】More than forty thousand readers told us what they looked for in close friendship, what they expected 【21】______ friends, what they were willing to give in 【22】______ , and how satisfied they were 【23...
A.
to
B.
for
C.
of
D.
on
【单选题】The teacher told us yesterday that December 25th __________ Christmas Day.
A.
is
B.
was
C.
has been
D.
will be
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