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题目内容
（请给出正确答案）
According to the passage, which of the following is true？
A．All people only buy things they need.
B．Both business people and advertisers increase sales through using psychology.
C．Scientists understand psychology better than business people.
D．Compulsive spenders can never get any help to solve their problems with money.
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第7题
A．温度和湿度传感器至现场控制器之间的连接应符合设计要求,镍温度传感器的接线电阻应小于4Ω,钼温度传感器的接线电阻应小于1Ω
B．风管型温度和湿度传感器尽可能安装在风管直管段,避开风管死角等位置
C．水管型温度传感器的感温段大于管道口径的1/2时,可安装在管道的顶部
D．水管型温度传感器的感温段小于管道口径的1/2时,应安装在管道的侧面或底部
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