We wondered _____ the boys' team _____ the girls' team the day before. [ ]

A. what; has lost to

B. whether; had lost to

C. if; lost to

D. if; had lost

塑料通常有如下（）特性。

A.密度小，比强度高

B.具有优异的导电性能

C.有良好的耐腐蚀性

D.对酸、碱及有机溶剂等具有良好的耐腐蚀性能

E.强度低，耐热性差，膨胀系数大，蠕变量大，易老化。