题目

阅读短文，判断正（T）误（F）。 Americans love sports—they love to play them, to watch them on television, and to talk about them. But this hobby sometimes has serious results—at least to the players. For example, when people play tennis, sometimes they hurt their elbow（肘部）and in this way they develop “tennis elbow”. Also it is easy to hurt a knee in a football game. These injuries（损伤）happen while the player is having fun, but they still hurt. A few months ago, Kathleen Simmons, who loves playing volleyball, hurt her knee in a volleyball game. Her doc如图是“长征六号”运载发射场景，它首次采用了我国最新研制的大推力液氧煤油发动机．下列说法正确的是（ ）A．煤油燃烧得越充分，其热值就越大B．燃气对火箭做功，燃气的内能会增加C．高温高压的燃气推动火箭升空把内能转化成机械能D．使用煤油作燃料，是因为它是可再生能源