180×（1-35），
=180×25，
=72（人）；
答：六年级有女生72人．
What would have happened ______as far as the river bank ?
A．Bob had walked farther
B．if Bob should walk farther
C．had Bob walked farther
D．if Bob walked farther
采购人与中标、成交供应商应当在中标、成交通知书发出之日起（）日内，按照采购文件确定的事项签订政府采购合同。
A.25
B.20
C.10
D.30
