凿井期间，立井可用吊桶升降人员，为使吊桶运行更加平稳，应采用哪种类型的钢丝绳？
参考答案：
不旋转提升钢丝绳。
We study in a school ____ fame is known nationwide and it is a school _______ we can fully develop our potential(潜能).
A．which; where
B．whose; which
C．who; that
D．whose; in which
2004年城镇居民家庭生活费用支出构成表
非商品支出中哪个等级支出最多（）
A．最低收入户
B．困难产
C．低收入户
D．中等偏下收入户
