问题
单项选择题
下列情况均可引起误差，属于系统误差的是()
A．反应温度调高
B．试剂的保质期已过
C．反应时间记录错误
D．标本量加错
E．分析仪器波长不准
答案
参考答案：E
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下列情况均可引起误差，属于系统误差的是()
A．反应温度调高
B．试剂的保质期已过
C．反应时间记录错误
D．标本量加错
E．分析仪器波长不准
参考答案：E
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| Some students cheat (作弊) because they're busy or lazy and they want to get good grades without 1 the time studying. Other students might feel that they can't 2 the test without cheating. Even when there seems to be a "good reason" for cheating, it isn't a good 3 . A student who thinks cheating is the only way to pass a test 4 to talk with the teacher and his or her parents so they can find some better ways together. Talking about these problems and 5 them out will help feel better than cheating. If a student is 6 cheating, the teacher may give a " 7 " on the test, send him or her to the head teacher's 8 , and call his or her parents. Worse than the 9 grade may be the feeling of having disappointed those people, 10 parents and teachers. A parent may worry that you are not an 11 person and a teacher might watch you more 12 the next time you're taking a test. There are plenty of reasons why a kid shouldn't cheat, but some students have already cheated. If that's you, it's 13 too late to stop cheating. Cheating can become a 14 , but a student is always able to act better and make better 15 . It might help to talk the problem over with a parent, teacher, or friend. | |||
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