【单选题】张同学想在10年后获得80000元,已知目前的存款利率为2%,张同学从现在开始,共计存10次,每年年末应该存入( )元。((P/A,2%,10)=8.9826;(F/A,2%,10)=10.9497)
【简答题】极差、平均偏差、相对平均偏差、标准偏差和相对标准偏差都可用来表示( )大小
【单选题】控制碳酸钙的滴定值主要是为了控制生料的( )。
【单选题】盘形凸轮机构的滚子从动件被损坏,换上一个半径不同的滚子,则 。
【单选题】Compared with public television, commercial television______.
A.
broadcast programs which don't advertise products
B.
have the right to choose programs for their audience
C.
have to broadcast programs that cater to preferences of their audience
D.
compete fiercely with other broadcasting stations