【单选题】Questionsare based on the conversation you have just heard. 根据录音,选择合适的答案( ) 查看材料
B.
She will fix it right now.
C.
She asks the man to sew it.
D.
She forgets where it is.
【判断题】The Twin Bridges is the symbol of Zhouzhuang. It was built in the Qing Dynasty and has a history of about 500 hundred years.
【单选题】通常在相同条件下,多次测量同一量时,误差的绝对值和符号保持恒定或在条件改变是,按某种规律而变化的误差称为()
【单选题】通常在相同条件下,多次测量同一量值时,误差的绝对值和符号均以不可预定的方式变化的误差,都属于( )。