可燃气体检测仪报警（高限）设定值应小于或等于可燃气体爆炸下限浓度（以体积百分数表示）值的25%。
参考答案：对
—Hurry up!(快点) There an NBA basketball game in ten minutes.
—OK.
A．is
B．will have
C．is going to be
D．is going to have
什么是象形文字？
