A：空气
B：糖水
C：天然气
D：干冰
如图是由边长相同的小正方形组成的网格，A，B，P，Q四点均在正方形网格的格点上，线段AB，PQ相交于点M，则图中∠QMB的正切值是（ ）
被伊斯兰教、基督教和犹太教奉为圣城的是
Christmas is my favourite 1. On Christmas, my family 2 my aunt，uncle and cousin to our house. We 3 gifts to each other. I give my cousin a 4 gift. We sing the Christmas 5 together. I think we are very happy.
