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【单选题】
光敏电阻的特性是( )A.
有光照时电阻很大
B.
无光照时电阻很小
C.
无光照时电流很大
D.
受一定波长范围的光照时电流很大
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
举一反三
【判断题】Spoken material is often heard many times in most cases like written material.
A.
正确
B.
错误
【简答题】Culture, like an iceberg, consists of two parts: 1 culture , which is exposed material culture, visible and easily described, and 2 culture , which is hidden in the material culture.
【简答题】Scientists have been trying to make soft and friendly robots, like Disney's Baymax, for years. And they have finally done it . Octobot is the world's first soft robot . It is not like the scary , meta...
【判断题】Spoken material is often heard many times in most cases like written material.
A.
正确
B.
错误
【简答题】乙数是甲数的20%,是把( )看作单位“1”。
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