不用刻度尺,试着画一个长为5厘米、宽为1厘米的长方形,然后用刻度尺比一比,并计算出周长。
周长:12厘米
曲线y=x3-1在x=1处的切线方程为___________
my mom not totrust those people easily, shewouldn’thavebeen cheated out of 50,000 yuan.
A.IfIwarn
B.IfIshouldwarn
C.HadIwarned
D.IfIwarned