题目

The Rockford police chief and some city officials want to install （安装） video cameras in all 100 police cars．They think this will reduce the number of lawsuits （法律诉讼）．In the last five years, Rockford has paid out more than five million dollars to settle about 40 lawsuits． The chief said, If cameras had been in those cars．we wouldn't have．had to pay one cent． We're always pulling over drunks or drug users who try to fight the police or shoot them．Then they always claim （声称） that the police start beating them first or start shooting at them first两个相似三角形面积之比为2∶7，较大三角形一边上的高为，则较小三角形对应边上的高为________．