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【单选题】
设 是一二元函数, 是其定义域内的一点,则下列命题中一定正确的是( )A.
在点 连续，则 在点 可导。
B.
在点 的两个偏导数都存在，则 在点 连续。
C.
在点 的两个偏导数都存在，则 在点 可微。
D.
在点 可微，则 在点 连续。
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反馈参考答案：
举一反三
【单选题】(仅选择本题号对应横线处的正确答案)Read aloud paragraphs 21-23 until you have learned them by heart. Then try to complete the passage from memory: The Reverend Nelson wrote that his ________ (1) as a "simple, old-fash...
A.
consume
B.
decades
C.
appreciated
D.
undergoing
E.
had done wrong
F.
accomplish
G.
relatives
H.
representing
I.
brought back
J.
welcome reassurance
【单选题】(仅选择本题号对应横线处的正确答案)Read aloud paragraphs 21-23 until you have learned them by heart. Then try to complete the passage from memory: The Reverend Nelson wrote that his ________ (1) as a "simple, old-fash...
A.
consume
B.
decades
C.
appreciated
D.
undergoing
E.
had done wrong
F.
accomplish
G.
relatives
H.
representing
I.
brought back
J.
welcome reassurance
【单选题】(仅选择本题号对应横线处的正确答案)Read aloud paragraphs 21-23 until you have learned them by heart. Then try to complete the passage from memory: The Reverend Nelson wrote that his ________ (1) as a "simple, old-fash...
A.
consume
B.
decades
C.
appreciated
D.
undergoing
E.
had done wrong
F.
accomplish
G.
relatives
H.
representing
I.
brought back
J.
welcome reassurance
【单选题】(仅选择本题号对应横线处的正确答案)Read aloud paragraphs 21-23 until you have learned them by heart. Then try to complete the passage from memory: The Reverend Nelson wrote that his ________ (1) as a "simple, old-fash...
A.
consume
B.
decades
C.
appreciated
D.
undergoing
E.
had done wrong
F.
accomplish
G.
relatives
H.
representing
I.
brought back
J.
welcome reassurance
【简答题】是中国外交的基石。
【单选题】(仅选择本题号对应横线处的正确答案)Read aloud paragraphs 21-23 until you have learned them by heart. Then try to complete the passage from memory: The Reverend Nelson wrote that his ________ (1) as a "simple, old-fash...
A.
consume
B.
decades
C.
appreciated
D.
undergoing
E.
had done wrong
F.
accomplish
G.
relatives
H.
representing
I.
brought back
J.
welcome reassurance
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