饰面板(砖)工程中，必须对以下哪种室内用的天然石材放射性指标进行复验______
A．大理石
B．花岗石
C．石灰石
D．青石板
参考答案：B
从事放射性物品道路运输的企业、单位，要有安全生产应急预案；从业人员、车辆、设备及停车场地安全管理制度；安全生产作业规程和辐射防护管理措施；安全生产监督检查和责任制度。
Directions:
You have just received a short message from your father informing that your mother is very ill and you want to ask for one week’s leave. Write a note (便笺) to your Office Head Mr. Wang about it.
You should write about 100 words on ANSWER SHEET 2.
Do not sign your own name at the end of the note. Use "Li Ming" instead.
Do not write the address.
