题目

—Since I quarreled with my wife, she has been finding fault with me almost every day. —Yeath, Faults are thick _______ love is thin. A . while B . although C . unless D . where 答案:D(2009?湖南)在衡阳农村一些地方,还保留一种“舂米对”的古代简单机械,其示意图如图,使用这个装置时,人在A端用力把它踩下后立即松脚,B端就会下落,打在石臼内谷物上,从而把谷物打碎,用力将它踩下去的过程中,舂自身的重力是“阻力阻力”(填“动力”或“阻力”).这是一个费力费力(填“省力”或“费力”)杠杆.
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