烤片机干燥区内,热气流在箱室内的循环路径为()。
A.一、二区为上进风,三、四区为下进风
B.一、二为下进风,三、四区为上进风
C.四个区均为上进风
D.四个区均为下进风
参考答案:B
(2013·成都七中考前模拟)If you decided to study in America, you have no choice but ________ your English greatly.
A.improves
B.improving
C.to improve
D.improve
捏法