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【多选题】
下列哪些因素决定Ig同种型抗原性的差异（）A.
CH氨基酸组成不同
B.
CL氨基酸排列顺序不同
C.
CH氨基酸排列顺序不同
D.
CL氨基酸组成不同
E.
VH含糖种类和数量不同
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【简答题】In the European Union, carrots must be firm but not woody, cucumbers must not be too curved and celery has to be free of any type of cavity. This was the law, one that banned overly curved, extra-knob...
【简答题】You must not be late and you must not be absent .
【单选题】The Ship Security Alert must not be sent to other ships in the vicinity,but be sent to a competent authority ashore
A.
The Alert must be sent to other ships,and to a competent authority ashore
B.
The Alert must be sent to other ships,but not be sent to a competent authority ashore
C.
The Alert must not be sent to other ships and not competent authority ashore
D.
The Alert must not be sent to other ships,but be sent to a competent authority ashore
【单选题】（）不属于尖轨与基本轨不密贴产生的原因。
A.
尖轨顶铁过长，补强板螺栓凸出
B.
基本轨工作边及尖轨非工作边有“肥边”造成假密贴
C.
基本轨、轨撑、滑床板挡肩之间存在“三道缝”
D.
尖轨跟端轨缝过大，间隔铁和夹板磨耗，螺栓松动，过车时加大了冲击
【单选题】A good story does not necessarily have to have a happy ending, but the reader must not be left .
A.
unsatisfied
B.
unsatisfying
C.
to be unsatisfying
D.
being unsatisfied
【单选题】It is suggested that the students __ to read the bad books.
A.
should not be let
B.
must not be let
C.
should not be allowed
D.
must not be allowed
【单选题】社会主义道德建设与社会主义市场经济的关系是( )
A.
社会主义道德建设是与社会主义市场经济相适应的
B.
社会主义道德建设是独立的一个系统，与社会主义市场经济没有必然的联系
C.
社会主义道德建设为社会主义市场经济体制的建立和完善提供道德价值导向
D.
社会主义道德建设会束缚社会主义市场经济的发展
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