学校科技组有18名女生，男生人数比女生人数的2倍少2人．学校科技组有多少名男生？
18×2-2
=36-2，
=34（人）；
答：男生有34人．
与空间不共面四点距离相等的平面有______个．
Last summer I took a course on______.
A．how to make dresses
B．how dresses be made
C．how to be made dresses
D．how dresses to be made
