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【单选题】
设函数 具有连续偏导数,在 处,有 ,则( )
A.
点 是函数 的极大值点
B.
点 是函数 的极小值点
C.
点 非函数 的极值点
D.
条件不够,无法判定
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A.
We call them mooncakes.
B.
Mr. Brown, my English teacher, will be visiting us this Saturday.
C.
We both arrived at the same conclusion.
D.
People, old and young, took to the streets to watch the parade.
【单选题】企业根据应收款项入账时间的长短来估计坏账损失的方法是( )
A.
应收款项余额百分比法
B.
账龄分析法
C.
赊销百分比法
D.
直接转销法
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A.
I am going to watch a movie as soon as I finish my homework.
B.
I am going home because I don't feel well.
C.
I am going to McDonald's for lunch after my appointment this afternoon.
D.
Tomorrow night, I am going to a concert!
【单选题】园林植物病虫害防治的基本方针是:
A.
保护环境,综合防治
B.
保护植物,消灭病虫害
C.
预防为主,治界治小
D.
预防为主,综合防治
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A.
预防为主,综合防治
B.
预防为主,治早治小
C.
保护植物,消灭病虫害
D.
保护环境,综合防治
【单选题】呼吸衰竭缺氧伴C02潴留患者不可能出现
A.
呼吸深快
B.
发绀
C.
心率、血压变化
D.
皮肤干燥
E.
球结膜充血水肿
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