在碱液清洗过程中加以搅拌，可使油污受到机械冲击作用而加快脱离金属表面。
参考答案：对
As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.
A．original
B．alternative
C．convenient
D．staple
股癣指皮肤癣菌感染下列皮肤部位（）
A.平滑皮肤、掌跖皮肤、腹股沟
B.平滑皮肤、腹股沟、会阴
C.平滑皮肤、腹股沟、头发
D.腹股沟、会阴和肛周皮肤E.腹股沟、会阴、甲板
