He was in a traffic jam，（）made him late for school.

I （）see the excellent performance yesterday.

A.was luck to
B.was fortunate to
C.was lucky
D.was fortunately

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脂质体药物属于（）

A.E级高危药品
B.D级高危药品
C.C级高危药品
D.B级高危药品
E.A级高危药品

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