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【单选题】
瞳孔正常直径为A.
2～3mm
B.
3～4mm
C.
4～5mm
D.
2～5mm
E.
4～6mm
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反馈参考答案：
举一反三
【单选题】We a science today.We an English class now. [ ]
A.
aren’t having ;are having
B.
aren’t have; have
C.
don’t have; are having
D.
don’t have; have
【单选题】We have an English class on Monday. , we don't have an English class on Thursday.
A.
But
B.
However
C.
Because
【简答题】A．When we are attending an English language course. B．When we are watching an interesting TV program. C．When we are enjoying the murmuring of a brook. D．When we are listening for a friend's voice in a...
【多选题】设函数 ,则下列正确的有( ).
A.
y ¢ = e x + xe x
B.
y ¢¢ = 2 e x + x e x
C.
y ¢¢¢ =2 e x + xe x
D.
y ( n ) = e x ( n + x )
E.
y ( n ) = e x ( n +2 x )
【单选题】We an English class now, and we a math class this afternoon.
A.
are having; will have
B.
will have; will have
C.
will have; have
D.
have; have
【简答题】设 是 上的奇函数， . 当 时，有 ，则 .
【单选题】按照化学渗透学说，驱动F 0 F 1 -ATP合酶合成ATP的力是______。
A.
跨线粒体内膜的膜电势
B.
跨线粒体内膜的化学势
C.
跨线粒体内膜的电化学势
D.
自身动力
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