模型石膏手工调和的时间以多久为宜() A.5min B.3min C.2min D. 发布时间:2017-06-06 22:10 │ 来源:www.tikuol.com 题型:单项选择题 A1型题 问题: 模型石膏手工调和的时间以多久为宜()A.5minB.3minC.2minD.1minE.<1min
题型:单项选择题 A1型题 Many people have problems _________ others. [ ]A. in communicating to B. to communicate with C. in communicating with D. communicate 查看答案
题型:单项选择题 A1型题 按照放射卫生防护基本标准的规定,在一般情况下,放射线工作人员连续三个月内一次或多次接收的总剂量当量不得超过年剂量限值的()。A.2/3B.1/2C.1/3D.1/4 查看答案