单项选择题

A．To measure amounts of rainfall.
B．To cheek the accuracy of scales.
C．To observe changes in the atmosphere.
D．To calculate the density of other metals.
<上一题 目录 下一题>
热门 试题

单项选择题
A．A man w. ho is courageous.B．A man who knows his faults.C．A man who knows his weakness.D．A man who has a clear knowledge of himself.
A．A man w. ho is courageous.
B．A man who knows his faults.
C．A man who knows his weakness.
D．A man who has a clear knowledge of himself.
单项选择题
A．We are making too many vehicles.B．We have more and more industry.C．There are too many developing countries.D．People use too many man-made materials.
A．We are making too many vehicles.
B．We have more and more industry.
C．There are too many developing countries.
D．People use too many man-made materials.
相关试题