通用电子计数器一般有哪几种测量功能?
参考答案:
通用电子计数器一般能测量频率,周期,时间间隔,也能实现累加计数,自较,外控时间间隔内计数,测频率比等多种功能。
患者闭眼用单手触摸熟悉的物体,如钢笔、钥匙、硬币等,并说出物体的名称是()。
A.皮肤定位觉
B.两点辨别觉
C.实体觉
D.体表图形觉
E.复合感觉
They were under the()that the company was doing well, but in fact it was in serious trouble.
A.conclusion
B.expression
C.enjoyment
D.illusion