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【单选题】
关于细胞因子的描述哪项是错误的()A.
细胞因子受体可以是 Ig 超家族成员
B.
可由非免疫细胞合成分泌
C.
对机体有利又有害
D.
相互之间可产生拮抗作用
E.
可不分泌到胞外起作用
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【简答题】质量为 m 的粒子在长度为 l 的一维势箱中运动,基态时粒子的能量为 E 1 ,当粒子处在 的状态时,测量粒子的能量为 E 1 的几率为多少? ( )。
【单选题】When the giant went to the mountains one day, the children went into his garden.
A.
真
B.
False
【简答题】Directions: Match the former part of each sentences to the latter part, so as to form a whole sentence. . ( ) 1. I received the same grade ( ) 2. As I was exhausted, ( ) 3. As we know, ( ) 4. Things a...
【单选题】______ the day went on, we became closer and closer to each other. [ ]
A.
As
B.
With
C.
When
D.
While
【简答题】子叶出土的棉花和大豆幼苗，在种子萌发形成幼苗的过程中，子叶之所以能推出土面，是由于_______伸长的结果。
【单选题】The children went home from the grammar school,their lessons ___ for the day.
A.
finishing
B.
finished
C.
had finished
D.
were finished
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