问题
单项选择题
可燃性气体报警仪的显示值以（）为单位。
A、%
B、LEL
C、%LEL
D、LEL%
答案
参考答案：C
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可燃性气体报警仪的显示值以（）为单位。
A、%
B、LEL
C、%LEL
D、LEL%
参考答案：C
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| In the depths of my memory, many things I did with my father still live.These things have come to represent,in fact,what I call__1__and love. I don't remember my father ever getting into a swimming pool.But he did__2__the water.Any kind of __3__ride seemed to give him pleasure.__4__ he loved to fish；sometimes he took me along. But I never really liked being on the water, the way my father __5__.I liked being at the water, moving through it,__6__it all around me.I was not a strong__7__, or one who learned to swim early, for I had my__8__.But I loved being in the swimming pool close to my father's office and__9__those summer days with my father,who 10 come by on a break.I needed him to see what I could do.My father would stand there in his suit, the 11 person not in swimsuit. After swimming, I would go 12 his office and sit on the wooden chair in front of his big desk, where he let me 13 anything I found in his top desk drawer.Sometimes,if I was left alone at his desk 14 he worked in the lab, an assistant or a student might come in and tell me perhaps I shouldn't be playing with his 15 . But my father always 16 and said easily,"Oh, no, it's 17 ."Sometimes he handed me coins and told me to get 18 an ice cream… A poet once said,"We look at life once, in childhood; the rest is 19 ."And I think it is not only what we "look at once, in childhood" that determines our memories, 20 the person who, in that childhood, looks at us. | ||||
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