题目内容

（）The reason why the electric eel is able to give more powedul shock is that．

A. compared with those in the torped0，the working system of electric plates in theeel is moreDirect and efficient
B. compared with other electric fish，the eel possesses much more electricDlates
C. the working system of the electric plates in the eel is far inferior to those in thetorpedo
D. the working system of the electric plates in the eel is the most effective

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答案为：

A. on design
B. for people
C. in architecture
D. with buildings

尼莫地乎：

28岁妇女，C1P0。因预产期超过2周收入院。估计胎儿体重在3500g，先露头，未入盆
入院后首先考虑的问题是

A. B型超声检查
B. 引产
C. 胎盘功能测定
D. NST试验
E. 详细询问末次月经及早孕反应

根据暴露与否来抽取样本的研究是