聚苯乙塑料是（），应注意防止外力冲压而遭致破坏。
A、塑性体
B、脆性体
C、易耗品
D、低值品
参考答案：B
At a rough estimate ( 估计), this country is ___________ Great Britain.
A．three times as the size of
B．three times large than
C．three times as larger as
D．three times the size of
