单项选择题

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

单项选择题
A．There are no rapids or waterfalls.B．There is a constant, strong wind.C．Navigation is rather difficult.D．Frequent storms cause problems for riverboats.
A．There are no rapids or waterfalls.
B．There is a constant, strong wind.
C．Navigation is rather difficult.
D．Frequent storms cause problems for riverboats.
单项选择题
Many Christians now re-enact Last Supper to symbolize Judas Iscariot’’s betrayal of Jesus.
A．Y
B．N
C．NG
相关试题