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问题 单项选择题

固定液的量一般应该为（）

A.组织块总体积的4～5倍，也可以达15～20倍

B.组织块总体积的1倍

C.组织块总体积的2倍

D.组织块总体积的3倍

E.至少是组织块总体积的30倍

答案

参考答案：A

选择题

— What _______ if you _______ on the Titanic? 　　

— What a question! 　　[ ]

A. would you do; were　　　　　　　　　　

B. did you do; were 　　

C. had you done; would have been　　　　　

D. would you have done; had been

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单项选择题

突触前神经元轴突末梢释放神经递质是哪种离子内流引起的

A．Ca2+

B．Na+

C．Cl-

D．K+

E．H+
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