转速一定时,汽油机每小时耗油量主要取决于()
A.开气门开度
B.混合气成分
C.节气门开度和混合气成分
D.汽油机结构
参考答案:C
(2013 ·安徽省级示范高中名校联考)—Hello! Friendship Hotel.Can I help you?
—Do you have a room with a double bed ________ for Saturday?
A.available
B.empty
C.possible
D.useful