下列哪一种情况不属于过失性错误()
A.弄错标本
B.漏作项目
C.填错结果
D.未注明检验单位
E.使用新批号试剂时产生的系统误差
参考答案:E
驾驶机动车在居民小区看到这种情况怎样安全行驶()
A.鸣喇叭提示行人
B.加速,尽快通过
C.保持正常行驶
D.减速,准备停车
Frictional unemployment results from:()
A. inflexible wages in the marketplace.
B. recessionary business conditions and inadequate aggregate demand for labor.
C. constant changes in the economy that prevent qualified unemployed workers from being immediately matched up with existing job openings.