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问答题

Complete each sentence with a number or word.65 million years ago, an asteroid crashed into Earth.
It was ______ kilometers wide.
It killed the dinosaurs and ______ % of all other life.
It caused a shockwave that killed anything within ______ kilometers in ______ seconds.
It made a crater in Mexico that is ______ kilometers wide.

不定项选择

宗族的族长一般由辈分高、德高望重的男性担任。

A．正确
B．错误