推进能源节约,是中国经济社会发展长期而艰巨的战略任务。我国应坚持政府为主导、市场为基础、企业为主体,在全社会共同参与下,全面推进能源节约。
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所谓晶体管输出特性曲线中的线性区域是指()。
A. 放大区
B. 饱和区
C. 截止区
晶体管工作在截止状态时,其发射结反偏,集电结正偏。
A. 对
B. 错
晶体管工作在饱和状态时,其发射结和集电结均正偏。
A. 对
B. 错
Multiple-choice: For each sentence there are four choices marked A, B, C, and D. Choose the one that best completes the sentence.Please let us know which of our products _______.
A. you are interested
B. are you interested
C. they are interested
D. you are interested in