15至70dB是较好的生活环境. [ ]
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在下面物质的物理性质中:①银白色金属;②延展性;③传热性;④导电性;⑤被磁铁吸引,其中铁、铜、铝三种金属都具有的是[ ]
A.①②③
B.②③④
C.③④⑤
D.①⑤
We admire this family, ______ the parents treat their child like a friend.
A.why
B.which
C.where
D.that