烧结用燃烧煤要求发热值越（）越好。
A.低
B.高
C.不控制
参考答案：B
按照“神舟”v号飞船环境控制与生活保障的设计指示，“神舟”v号飞船返回舱的温度为九1℃±0.4℃，则返回舱的最高温度为______℃，最低温度为______℃．
Anyone ______ trying to take knives on heard flights would be caught by the police.
A．finds
B．found
C．being found
D．will find
