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【多选题】
关于中枢化学感受器的叙述,正确的是:
A.
位于延髓腹外侧浅表部
B.
分为头.中.尾三个区
C.
对血液中H+浓度变化非常敏感
D.
对脑脊液中H+的变化敏感
E.
不能维持对呼吸的驱动
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参考答案:
举一反三
【单选题】____ is well known that the earth turns around the sun.
A.
It
B.
As
C.
Which
D.
That
【单选题】The moon turns round the earth , just _____ the earth circles round the sun .
A.
therefore
B.
as
C.
thus
D.
so
【单选题】Our teacher told us that the moon _________ round the earth.
A.
went
B.
turned
C.
go
D.
turns
【简答题】A.The water turns gray. B.It grows again. C.Life on earth improves. D.Life on earth dies.
【简答题】________ moon turns around _______ earth.
【单选题】What a lovely toy race car! Could you please tell me ( ) ?
A.
why did you get it
B.
when will you get it
C.
where you got it
D.
how will you get it
【单选题】It is the theory ____the earth turns around the sun____ changes the world. [     ]
A.
that; what
B.
what; that
C.
that; which
D.
that; that
【简答题】A.The water turns gray. B.It grows again. C.Life on earth improves. D.Life on earth dies.
【单选题】A.The water turns gray.B.It grows again.C.Life on earth improves.
A.
The water turns gray.
B.
It grows again.
C.
Life on earth improves.
D.
Life on earth dies.
【简答题】11. Paolo usually washes his car on weekends, but last weekend he ____ it.
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