如果设备已经安装，而实际价格又尚未结出，统计上可暂时按照（）价格计算，待实际价格结出后另行调整。
A.决算
B.概算
C.结算
D.预计
参考答案：B
根据句意及首字母的提示，补全单词。
1. When we meet for the first time, we usually s ____ hands.
2. I don't want to eat anything. I'm f______.
3. I often brush my teeth with this kind of t______.
4. I,t is a good way to ____ HINl by washing hands with soap.
5. I don't know the man. He is a s ____
当选用50KV的管电压进行X射线探伤时，应采用何种增感屏？（）
A、荧光增感屏
B、无需增感屏
C、铅箔增感屏
D、金属荧光增感屏
