套管其公称直径为φ168mm，当内径是φ150mm时，其管体重是38.5kg／m。
参考答案：错
By 16∶30，________was almost closing time，nearly all the paintings had been sold.
(2012·江西，28)
A．which
B．when
C．what
D．that
选择性钙通道阻断药不包括：
A．尼莫地平B．地尔硫革C．维拉帕米D．普尼拉明E．硝苯地平
