设某病的自然康复率为30%，求10个该病患者中自然康复1人及以下的概率（）
A.
B.
C.
D.
E.以上均不对
参考答案：B
—Mei will represent our class in the English Speech Contest.
—She is clever and can speak English really well. She will not make us disappointed
A．knock into us
B．care about us
C．let us down
D．help us out
这个地面标记的含义是预告前方设有交叉路口。
