搜题
王老师:19139051760(拨打)
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第1题

设x²+y²≤a∫∫dσ=4π,这里aィ0,则a=() A. 4 B. 2 C. 1 D. 0
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第2题

4.If I ____ your address, I would have visited you.(3分) A. know B. knew C. have known D. had known
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第3题

3.Online shopping _____ competition to traditional business operation.(3分) A. takes B. delivers C. brings D. carries
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第4题

2.For some individuals financial security is still viewed _____ a dream that can never be achieved.(3分) A. to B. with
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