【单选题】在放大电路中,测得三极管各电极对地电位如图所示,则三极管1、2、3三管脚依次为( )。
【判断题】炭疽杆菌在血液琼脂板上生长出湿润粘稠的白色菌落,周围没有溶血环()
【判断题】微博个人认证只需要提交身份证就行了,对粉丝没有任何要求。
【简答题】Some people have very good memory(记忆力) and they can easily remember quite long texts. There are other people who can only remember things when they have said them again and again. The famous English w...
【单选题】测得放大电路中三极管各极电位如图 1-1 所示,则该三极管为( ) 图1-1