斜坡道上运输基本制度是什么？
参考答案：
斜坡道上运输，必须坚持“开车不行人，行人不开车”，“开车亮红灯，停车红灯灭”制度。
桑塔纳2000GSi型轿车AJR型发动机空气流量传感器采用（）流量传感器。
A．卡门涡旋式
B．翼片式
C．热线式
D．热膜式
Why have the Americans developed space shuttle according to the passage
Why have the Americans developed space shuttle according to the passage A．It is a first step to explore outer space.B．It is a follow-up action of the Apollo moon landings.C．It is a compromise to the exorbitant human expeditions to the Mars.D．It is a compensation for the wishful thinking of human landing on the Mars.
A．It is a first step to explore outer space.
B．It is a follow-up action of the Apollo moon landings.
C．It is a compromise to the exorbitant human expeditions to the Mars.
D．It is a compensation for the wishful thinking of human landing on the Mars.
