问题
选择题
正确量取8mL液体,应选用的最合适仪器有( )
①5mL量筒 ②10mL量筒 ③50mL量筒 ④胶头滴管.
A.①④
B.②
C.③④
D.②④
答案
选取量筒时要选取比所量液体体积大,且最接近的,误差小,当加液体时,快到刻度时要改用胶头滴管,减小误差.
故选D.
正确量取8mL液体,应选用的最合适仪器有( )
①5mL量筒 ②10mL量筒 ③50mL量筒 ④胶头滴管.
A.①④
B.②
C.③④
D.②④
选取量筒时要选取比所量液体体积大,且最接近的,误差小,当加液体时,快到刻度时要改用胶头滴管,减小误差.
故选D.
阅读理解。 | ||||
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