【多选题】半导体二极管实质上是由 [填空(1)] 构成,其主要特性是 [填空(2)] 。
【判断题】由P型半导体引出的电极是晶体二极管的正极。
【单选题】—Perhaps I'm going to the market. —Would you get me some juice ______ you're there? [ ]
【多选题】依据《电力生产安全工作规定》(华电国际生〔2013〕914号),基层企业应每月召开一次安全网例会,例会的主要内容包括___。
【判断题】二极管是P型半导体和N型半导体接合而成的。( )
【单选题】How would an economist establish the market demand curve for a private good?
A.
by adding consumer surplus to total expenditure
B.
by combining individual demand curves horizontally
C.
by combining the price elasticity of individual demands
D.
by multiplying price by quantity demanded
【简答题】How is the bill of exchange transferred in the market?
【多选题】国际生产折衷理论认为,一个企业要从事对外直接投资必须具有()。
【简答题】当 所选的 电流的参考方向 与 实际方向相反时,则电流强度为( )值。(提示:填 “ 正 ”or“ 负 ” )