()是牧区经济的支柱产业。 ["草原畜牧业","工业","农业","旅游业"]
如果旅客持已办理过签转手续的客票前来确认本公司航班的定座,定座部门应注意()。 ["A、原始出票人与本公司有无结算关系","B、原航班承运人与本公司有无结算关系","C、原航班是否已经起飞","D、旅客是否亲自前来"]
典型卵巢畸胎瘤X线表现() ["输卵管受压变形","瘤体密度不均","卵巢增大,边缘光滑","瘤内有透亮区","盆腔见骨组织及牙齿影"]
退耕还林还草要坚持政策引导和()原则,充分尊重农民的意愿。 ["贷款扶持","政府命令","农民自愿","奖罚分明"]
昏迷患者鼻饲流质每次给多少为宜() ["150ml","250ml","350ml","450ml","500ml"]
简述可编程序控制器的应用范围。