题目

阅读下列短文，从每题所给的A、B、C、D 四个选项中选出最佳选项。Mostof us are aware that we must take care of the environment, and the majority ofus take steps to save energy and reduce waste and pollution. But recently some greentruths have been shown to be only half true, or even completely false.Here are some common ones. Which are really green??It's better to take a shower than a bath.It depends on how long you spend in the shower and how large your bath is. If you spend more than eight minutes in a shower, you'll use as much water as in a bath—about 50 litres of已知正方形ABCD，E是CD的中点，P是BC边上的一点，下列条件中不能推出△ABP与△ECP相似的是（ ）A．∠APB=∠EPCB．∠APE=90°C．P是BC的中点D．BP：BC=2：3