制动时，液力偶合器因摩擦产生高温，偶合器使用不合格的易熔塞和油介质，致使液力偶合器喷油引起火灾。
参考答案：对
一列火车通过530米的桥需要40秒，以同样的速度穿过380米的山洞需要30秒。这列火车的速度是每秒（ ）米，车身长是（ ）米。
Consider the following two final consumer goods: Good W requires the inputs of raw material R and intermediate goods S and T. Good X requires the inputs of raw material R and intermediate goods U and V. If demand for Good W increases and demand for Good X decreases, which of the following out comes is least likely（）
A. Some of raw material R will be diverted away from the producers of Good X.
B. The price of Good U will decrease and the price of Good S will increase.
C. More resources will be devoted to producing Good W and less to producing Good T.
