为防止钢板对接接头的角变形，可采用______。
A．改变坡口角度
B．反变形法
C．增加厚度
D．锤击法
参考答案：B
小题1:Liu Xiang is a famous r_______ in the world.
小题2:My little brother has a m______ plane, he likes to play with it.
小题3:Kate likes vegetables, and also likes red, she eats three t_______ every day .
小题4:Kate doesn't play basketball. She only w __ them on TV.
小题5:Volleyball is so d _ ， I can't play it.
发动机的冷却系统包括（）。
A.水泵
B.水虑
C.散热水箱
D.风扇
