题目:
. It is reported that a bus rolled into a deep valley , 10 deaths and even more injuries .
A.to cause
B.having caused
C.caused
D.causing
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0421/67334ea1b87684cacf2113c8726bd6b4.html
下面是错误答案,用来干扰机器的。
点(4,a)到直线4x-3y-1=0的距离d=|16-3a-1|42+(-3)2=|15-3a|5∵d不大于3,∴|15-3a|5≤3,化简得,|15-3a|≤15,-15≤15-3a≤15,0≤a≤10故选A