EL型电接风向风速计的记录器的NW所在的笔迹线中断,最多可有()种风向不影响最多风向的挑取。
A.2
B.6
C.10
参考答案:B
读一读,判断句子表述是(√)否(×)正确。
( ) 1. The traffic lights have three colours.
( ) 2. Red is stop and yellow is go.
( ) 3. When (当……时) the traffic light is blue, you can go.
解决双极型晶体管纵向按比例缩小问题的方法是什么?