在天然石材的放射性指标中,B类天然石材的外照射指数应不大于( )。
A.1.3B.1.5C.1.8D.1.9
参考答案:D
()命令是利用终点位置的坐标进行编程。
I’ll have the damaged parts repaired in Hongkong and send you in due course the amount of expenses().
A.incurred
B.happened
C.spent
D.paying out