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【简答题】
若要求一个稀疏图的最小生成树,最好用 算法求解。
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】听力原文：W: You look worried, David. Anything wrong (19) ? M: Oh, it's nothing, really. W: Are you sure? Like to talk about it? M: Well, to be honest, it's.., it's my mother. She… she.. how shall I put it...
A.
Because his wife has been behaving strangely.
B.
Because his father has suddenly had a heart attack
C.
Because his mother is still so unhappy about his father's death.
D.
Because his daughter is all alone in a big house by the sea..
【单选题】听力原文：W: I often go to cinema. M: Really? W: What does the woman often do? (19)
A.
Read books.
B.
Watch TV.
C.
See films.
【简答题】凡是以有机物为碳源、能源和供氢体的微生物称为 。所有致病微生物均为 型 微生物。
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