径迹蚀刻法、活性炭盒法滤膜的作用是()
A.防止氡气进入采样盒
B.防止尘土进入采样盒
C.防止氡子体进入采样盒
D.防止氡及其子体一并进入采样盒
参考答案:C
—When will the problem be settled?
—Be patient! The person _______ will see to it as soon as possible.
A.in need
B.in demand
C.in response
D.in charge
期货公司计算()时,应按企业会计制度的规定对相关项目充分计提资产减值准备。
A.负债
B.净资产
C.资本公积
D.净利润