问题
单项选择题 A3/A4型题
分光光度仪属于精密仪器，使用要求比较严格，一般都要进行光源检查和波长校正。
关于波长校正的说法正确的为（）
A.可用镨钕玻璃校正
B.温度对波长的精度无影响
C.标准重铬酸钾溶液不能用来校正波长
D.波长精度在±6～±7nm可不调整
E.不能通过光源检查来筛选波长
答案
参考答案：A
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分光光度仪属于精密仪器，使用要求比较严格，一般都要进行光源检查和波长校正。
关于波长校正的说法正确的为（）
A.可用镨钕玻璃校正
B.温度对波长的精度无影响
C.标准重铬酸钾溶液不能用来校正波长
D.波长精度在±6～±7nm可不调整
E.不能通过光源检查来筛选波长
参考答案：A
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| Tears clouded my eyes as I stood in our washing room, holding Brett's jeans and shirt full of burn holes. Tired and defeated, I__1__to the floor. The clothes were just one more thing Brett had__2__. He often got almost everything in the house out of__3__.Many windows in our house needed repair due to his breaking__4__to steal money when he chose to live on the street. Yet none of this could compare to the emotional__5__Brett had done to our once quiet home. Brett came to live with us when he was 12 years old. During the next few years I had dealt with Brett as__6__as possible, but inside I was shouting,"I don't want him in my house another day, Lord! I just can't__7__him!" Having wiped my tears, I continued__8__him as before. When Brett was nearly 18, he landed again in Juvenile Hall(少管所)．After that, my husband and I had to send Brett to a boarding school for helping__9__teens.At the__10__ceremony, each graduate held a white rose to give to the person who had__11__the most to him or her. Brett spoke__12__to his parents and then spoke to me, "You did so much. You were always there, no matter__13__.My mom and dad, I am their kid. But you,__14__troubled enough by me, always__15__me such love. And I want you to know I love you for it." __16__,I stood as Brett placed the white rose in my hand and hugged me__17__. At that moment, tears__18__in my eyes again, this time not for disappointment but for__19__. Although I had struggled with silent__20__toward my stepson, Brett had seen only my actions. Love is action. We may not always have positive feelings about certain people in our lives, but we can love them. | |||
| ( )1.A.sat ( )2.A.lost ( )3.A.order ( )4.A.off ( )5.A.pain ( )6.A.patiently ( )7.A.forgive ( )8.A.feeding ( )9.A.lazy ( )10.A.opening ( )11.A.afforded ( )12.A.lovingly ( )13.A.where ( )14.A.although ( )15.A.cost ( )16.A.Astonished ( )17.A.surely ( )18.A.fell ( )19.A.pity ( )20.A.love | B．bent B．ruined B．place B．in B．injury B．willingly B．stand B．pardoning B．disappointing B．official B．meant B．sadly B．how B．unless B．lent B．Puzzled B．tightly B．flowed B．luck B．anxiety | C．sank C．torn C．trouble C．up C．harm C．strictly C．educate C．comforting C．troublesome C．graduation C．supplied C．proudly C．who C．because C．showed C．Encouraged C．roughly C．moved C．happiness C．care | D．dropped D．broken D．danger D．away D．damage D．rudely D．control D．parenting D．careless D．victory D．owed D．nervously D．what D．when D．taught D．Interested D．fiercely D．gathered D．success D．anger |