萘的特性主要有：有毒、刺激皮肤、刺激眼睛、刺激呼吸道。
参考答案：对
点A（-6，8）到x轴的距离为______，到y轴的距离为______，到原点的距离为______．
________ the teachers is about 300 in our school and it is becoming_____________.
A．The number of, more and more
B．The number of, bigger and bigger
C．A number of, more and more
D．A number of, bigger and bigger
