皮皮学，免费搜题
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搜题
【单选题】
金属热电阻式传感器简称为热电阻,而半导体热电阻式传感器简称为( )。A.
光敏电阻
B.
压敏电阻
C.
声敏电阻
D.
热敏电阻
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【单选题】预测某发生源在20m处预测点的等效声级贡献值为70 dB,而该预测点的背景值为70 dB,则该处的预测等效声级为()
A.
70 dB
B.
、73 dB
C.
75 dB
D.
76 dB
【单选题】Why is liberal education crucial in the nation's economic life?
A.
It helps to produce more entrepreneurs in stead of more engineers.
B.
It helps people form. a habit of mind that enables them to innovate.
C.
It enables people get connected with each other in economic life.
D.
It leads to the creation of wealth and jobs in the society directly.
【单选题】– Why not stay for a few more minutes? – ______. My parents will be worried.
A.
All right
B.
It’s getting late
C.
Take your time
相关题目：
【单选题】预测某发生源在20m处预测点的等效声级贡献值为70 dB,而该预测点的背景值为70 dB,则该处的预测等效声级为()
A.
70 dB
B.
、73 dB
C.
75 dB
D.
76 dB