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【单选题】
关于原浆性星形胶质细胞的描述中,哪一项错误?A.
细胞呈星形多突
B.
突起短粗,分支多
C.
表面粗糙
D.
细胞质内有少量胶质丝
E.
分布于中枢神经系统的灰质和白质
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【单选题】That you cannot feel the movement of earth does not mean that the earth is really______.
A.
steady
B.
sturdy
C.
stubborn
D.
stationary
【单选题】By citing the toothpaste is out of the tube, the author intends to mean that______.
A.
a younger generation of unskilled immigrants has been produced and their number will grow
B.
the unskilled immigrants have dragged down the wages of the natives and will continue to do so
C.
the children of unskilled immigrants have done poorly in school and will likely to drop out soon
D.
the unskilled immigrants have already been here and will certainly not return
【简答题】A．Because the Earth is heavily polluted. B．Because nature cannot recycle its resources. C．Because there are more and more people living on the Earth. D．Because no more new resources can be added.
【单选题】Researchers cannot ( ) the possibility that Earth may one day run out of its orbit.
A.
hand out
B.
drop out
C.
rule out
D.
keep out
【简答题】样品经处理后的处理液体积较大,待测试成份浓度太低,此时应进行浓缩,以提高被测组分的浓度,常用的浓缩方法有
【简答题】样品经处理后的处理液体积较大,待测试成份浓度太低,此时应进行浓缩,以提高被测组分的浓度,常用的浓缩方法有 和 。
【简答题】样品经处理后的处理液体积较大,待测试成份浓度太低,此时应进行浓缩,以提高被测组分的浓度,常用的浓缩方法有 和 。
【单选题】People feel cool when they are near a lake or an ocean because______.
A.
the earth cannot make the air over the earth hot
B.
the earth is very hot
C.
cool air from the water moves towards the land
D.
the water is colder than the earth
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