防雷保护装置安装要求每栋建筑物地面以上至少留有（）个接地电阻测定用的测点，并标识明显清晰。
A．1
B．2
C．3
D．4
参考答案：B
下列哪个脏器不发生坏疽（）
A.肺
B.阑尾
C.下肢
D.小肠
E.脑
We don't like him because he is always speaking highly of the part he________in the group.[ ]
A. makes
B. takes
C. does
D. plays
