学校合唱团有女生156人，女生人数是男生人数的2倍．合唱团有男生多少人？
156÷2=78（人）．
答：合唱团有男生78人．
如图所示一矩形断面通风管道，断面尺寸为1.2m×0.6m，空气密度ρ=1.20kg/m3，流速v=16.2m/s，沿程阻力系数λ=0.0145，流程长度L=12m的沿程压强损失为（）N/m2。
A．28.14
B．31
C．34.25
D．45.51
词汇（10分）
小题1:There are too many children ____( 咳嗽)in her class today
小题2:Ben is ___(躺)on the grass and enjoying the sunshine.
小题3:Everyone has two ____（脚）
小题4:If you have a _____(胃疼),you should not eat anything
小题5:Can’t you see the__________ (标牌)”No parking ”at the corner?
小题6:A few ____（乘客）got on the bus just now
小题7:My sister is a ____（.护士）She works in a hospital.
小题8:Alice ________ (厌恶)to do the dishes, but she likes sweeping the floor.
小题9:Playing computer games too much is a ________(浪费) of your time.
小题10:My bike is broken. Could you ________ (借给)me yours, please?
