题型:判断题 —Will you please repeat your idea?—Certainly. But I'm sure that you ________ your attention.[ ]A. don't payB. didn't payC. aren't payingD. weren't paying 查看答案
题型:判断题 如果a克某气体中含有的分子数为b,则c克该气体在标准状况下的体积是(式中NA为阿佛加德罗常数)( )A.22.4bcaNA升B.22.4acbNA升C.22.4abcNA升D.22.4bacNA升 查看答案
题型:判断题 根据专利法律制度的规定,如果申请文件是邮寄的,专利申请日为()。A.国务院专利行政部门收到专利申请文件之日B.国务院专利行政部门收到专利申请文件次日C.寄出的邮戳日D.申请文件载明的日期 查看答案