下列各组溶液中，不用其他试剂无法将他们区别开来的是 [ ]

搜题请搜索小程序“爱下问搜题”

问题选择题

A．HCl、Na₂CO₃、Mg(NO₃)₂、NaOH

B．NaCl、AgNO₃、CaCl₂、Na₂CO₃

C．NaOH、CuSO₄、MgSO₄、HCl

D．NaOH、AlCl₃、MgSO₄、HCl

答案

答案：B

选择题

The building was purchased and by its new owner last year. [ ]

A. occupied

B. lived

C. resided

D. settled

判断题

带有溢流口的卫生器具安装时，排水栓溢流口应对准卫生器具的溢流口，镶接后排水栓的上端面应低于卫生器具的底部。