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【单选题】
设 其中F为可导函数, 则A.
z-xy
B.
z-2xy
C.
Z+xy
D.
Z+2xy
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【单选题】Television is another major instrument of communication______ us to see as well as hear the performer.
A.
admitting
B.
permitting
C.
approving
D.
promising
【简答题】关于技术进步对行业的影响，下列各项中不正确的说法是（ ）。
【简答题】阅读短文，选择正确答案。 What does it mean when parents fight? It's hard for most people to hear their parents shouting at each other. You might worry more about one parent or the other during an argument. Or may...
【简答题】根据对话情景，填入恰当的单词， 每空一词。 A: What are you doing for 1 ? B: I'm going to Thailand. I hear Thailand is a good place to go 2 . A: 3 are you going with? B: I'm going with my parents. A: How long are you 4 the...
【单选题】'I'm going to Hong Kong for vacation.' '_____.' [ ]
A.
Thank you for telling me
B.
I'm sorry to hear that
C.
I'm going hiking for vacation
D.
I hope you'll have a good time
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