问题
单项选择题
X线机上不常用的仪表有
A．电源电压表
B．千伏表
C．安培表
D．毫安表
E．毫安秒表
答案
参考答案：C
解析： 电源电压表用于显示电源电压，千伏表显示管电压，毫安表显示管电流，毫安秒表显示管电流与时间的乘积，只有安培表不是常用仪表。
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X线机上不常用的仪表有
A．电源电压表
B．千伏表
C．安培表
D．毫安表
E．毫安秒表
参考答案：C
解析： 电源电压表用于显示电源电压，千伏表显示管电压，毫安表显示管电流，毫安秒表显示管电流与时间的乘积，只有安培表不是常用仪表。
On last Christmas Day, our parents’ home was full of joys of a close family relationship but this year things are . Our father had gone on November 26, and this was our Christmas without him. Mother was doing her best to be good, but I could tell this was especially for her. I’m not sure I should give her my planned Christmas gift. A few months earlier I had painted two pictures of my parents. I’d planned to give them as gifts. While painting one day, I was surprised by the doorbell ringing. I opened the . My father came. I showed the paintings. Finally, with tears running down his face, he said, “I don’t believe it. Look, how beautiful your mother is. Will you let me decorate them with frames(边框)?” I offered to send them to the frame shop the next day. Several had passed after my dad died. It seemed all was taken away from my mother and me. I finally remembered to call about the paintings and was glad that my father had got a chance to see the pictures he died. I was surprised when the shopkeeper told me my father had visited the shop, the frames and had them wrapped. As I my mother’s sad eyes and unsmiling face, I to give her Daddy’s and my gift. After looking at the paintings and the card, with tear-filled eyes and a wide smile, she said, “ I knew Daddy would be us on Christmas Day!” I looked at the gift card with my father’s handwriting. “ Mother: Our daughter reminded me why I am so lucky. I’ll be looking at you always. Daddy.”
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