华氏温度77度换算成摄氏温度和绝对温度分别为（）。
A．28℃、302K
B．25℃、298K
C．25℃、248K
D．30℃、303K
参考答案：B
The meeting started at ten o’clock, but the chairman has not _________ yet.
A．turned up
B．turned down
C．turned out
D．turned off
