问题描述:
[单选]
小明利用天平和量筒测量老陈醋的密度,下列操作步骤中多余的是()
A.用天平测量空烧杯的质量
B.将老陈醋倒入烧杯中,用天平测量烧杯和老陈醋的总质量
C.将烧杯中的老陈醋倒入量筒中一部分,测出量筒中老陈醋的体积
D.用天平测量烧杯和剩余老陈醋的总质量
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答案解析:无
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上一篇:下列的表述不完全正确的一项是()
下一篇:完形填空 (完成1-10题)July and August are good time for many children because they don"t need to go to school. But I don"t feel so happy in these two 1 . Every morning, I get 2 at 10( ) 30. Then I often watch TV 3 seven or eight hours with a lot of food in my hands. My mother 4 me,“Anna, you can"t waste(浪费)your 5 like this. You can do some good things.” So I get job(工作) in KFC and 6 there seven hours a day. The job is boring. Every evening,when I go home, I am very 7 .But my mother is very 8 .She says,“You can learn lots of things 9 this job. It"ll be a 10 experience(经历).(1)
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