皮皮学，免费搜题
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搜题
【单选题】
传感器就是将被测量量按一定规律转换成便于应用的某种物理量的装置,现实中传感器转换后的信号大多为()。A.
光信号
B.
电信号
C.
声信号
D.
非电信号
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Speaker A: Hi! How are things? Speaker B: ______________
A.
Hi, How are you?
B.
Great! How is it going with you?
C.
I'm fine.
【单选题】Speaker A: What subjects do you study? Speaker B :_________________
A.
I go to school at seven.
B.
I study English, maths, Chinese,etc.
C.
I don’t like maths.
【单选题】According to the speaker, how can a speaker indicate that the topic is about to change?
A.
By raising pitch.
B.
By lowering register.
C.
By pointing to a chart.
D.
By pausing.
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