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【单选题】
农用地土壤污染（ ）指农用地土壤中污染物含量等于或者低于该值的，对农产品质量安全、农作物生长或土壤生态环境的风险低，可以忽略；超过该值则可能存在风险，应当加强土壤环境监测和农产品协同监测。A.
背景值
B.
环境质量标准值
C.
风险筛选值
D.
风险管控值
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举一反三
【简答题】A. It doesn't have any cooperation with other companies.B. It has limited kinds of software products.C. The after-sales team isn’t effective and qualified.D. It doesn’t adopt an appropriate marketing ...
【多选题】下列关于会计档案的销毁的说法正确的是（ ）。
A.
需要销毁的会计档案应当编制会计档案销毁清册
B.
单位负责人应在会计档案销毁清册上签署意见
C.
销毁时，应由单位档案机构和会计机构共同派员监销
D.
销毁后，监销人要在销毁清册上签名盖章
【单选题】Questions 12 to 15 are based on the conversation you have just heard.
A.
It doesn't have any cooperation with other companies.
B.
It has limited kinds of software products.
C.
The after-sales team isn't effective and qualified.
D.
It doesn't adopt an appropriate marketing strategy.
【单选题】A pressworking operation, generally completed by a single application of pressure, often results in the production of a finished part in ( ).
A.
a few minutes
B.
a few seconds
C.
more than one minute
D.
less than one second
【单选题】以下关于手足口病的表述不正确的是
A.
手足口病患者和隐性感染者均为传染源
B.
人群对本病普遍易感,感染后具持久免疫
C.
主要经消化道、呼吸道和密切接触途径传播
D.
儿童为好发人群
E.
一年的四季均可发平邮,不同地区流行季节不同
【单选题】The biggest problem you generally encounter while towing a single tow astern is ().
A.
The catenary dragging on the bottom
B.
Swamping of the tow
C.
The tow tending to dive
D.
Yaw
【简答题】设x,y均为int型变量,描述“x,y符号相同” 的表达式是( )。
【简答题】设 x , y 均为 int 型变量,描述“x,y符号相异”的表达式是 。
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