Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）. ["persons in the space wear gas masks","persons in the space wear damp cloths over their mouths and nostrils","ventilation system is secured and all persons leave the space","ventilation system is kept operating"]
在我国境内销售或采购进口药品，以下说法不符合《药品流通监督管理办法（暂行）》规定的是（） ["医疗机构采购进口药品，必须向进口药品经销企业索取进口药品注册证和口岸药检所的进口药品检验报告书复印件，并加盖经销企业公章","进口药品国内销售代理商必须具有《药品经营许可证》","进口药品在国内市场销售，国外制药厂商必须选定中国合法的进口药品国内销售代理商","进口药品在国内销售，只接受所在地省级药品监督管理部门的监督管理"]
了解、研究班级群体包括哪些内容？
如何检修断路器（自动空气开关）？
客户在某农商行网点办理现金银行汇票签发，出票金额为700元，应收取手续费（）。 ["7元","8元","5.5元","6.5元"]
如何检修二次回路？
