雌激素和孕激素协同的作用是
A．子宫收缩B．子宫颈黏液有羊齿状结晶C． * * 发育D．基础体温上升E．输卵管蠕动
参考答案：C
If I could help___,I needn’t have taken trouble to send the broken computer to the repairing centre.
A．myself
B．it
C．that
D．this
机、柜安装对安装人员有什么要求？
