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【简答题】
有甲乙两批种子,发芽率分别是0.8和0.7,在这两批种子种各取一粒,则“至少有一粒发芽”的概率是____。(小数表示)
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【单选题】The traditional image of cave dwellers is probably ape-like creatures clad in skimpy animal skins, complete with clubs and matted hair and chewing unidentifiable bones. But in the region around Saumur...
A.
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B.
Caves inhabited since prehistoric times.
C.
People who dress in animal skins.
D.
People who choose to live in caves.
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