A:送木条是易燃物,硫磺是阻燃物
B:“法烛”燃烧会产生刺鼻气味
C:硫磺降低了松木的着火点
D:吹灭“法烛”是因为隔绝了空气
绿色开花植物的植物体的构成是( )
We are planning to have a surprise party ________ her fifteenth birthday