用35厘米长的铁丝围成一个等腰三角形,已知腰和底的长度比是3:1,则腰长______厘米.
3+3+1=7,
35×37=15(厘米);
答:腰长是15厘米;
故答案为:15.
—I bought the digital camera two months ago.
—You mean that you __________ it for two months. [ ]
A. have had
B. have been
C. have bought
D. have taken
计算机病毒也像人体中的有些病毒一样,在传播中发生变异