一定量程的电流表,表头灵敏度越高,需要并联的分流电阻就()。
A、越大
B、越小
C、随意
参考答案:B
短文改错(共10小题,每小题1分,满分10分)
I felt sadly yesterday when our teacher told us something 小题1:
about Project Hope in class. It has set up to help the 小题2:
children in the countryside who can't afford to going to 小题3:
school. After school I come home. I was wondering if I 小题4:
could do something for the Project then I caught sight 小题5:
of my money-collecting box on the table. But I made 小题6:
up my minds to send my pocket money to the children 小题7:
who wanted to go to school. I wrote with a letter to them and 小题8:
hurried to the post office. I posted the money and sent her 小题9:
best wishes together with the letter to them. 小题10:
螺旋反折包扎法不可在伤口上或骨隆突处反折。