下列金属中导电性能最好的是（ ）
A．铜
B．铝
C．铁
D．银
答案：D
题目分析：金属中导电性的顺序为银、铜、铝、铁故导电性最好的为银，答案选择D
选出下列各项中字形有误的一项（）
A妙手回春妙语连珠灭顶之灾民不聊生
B 明察暗访明察秋毫明明白白明目张胆
C明争暗斗明知故犯明知故问明智之举
D 鸣冤叫屈名不副实炉火纯清自名得意
Most of the evidence was destroyed in the fire. ______, it would be almost impossible to prove Jim guilty.
A．Anyhow
B．Thus
C．However
D．Besides
