单项选择题

A．By theme or period.
B．By style or design.
C．By manufacturer or origin.
D．By function or purpose.
<上一题 目录 下一题>
热门 试题

填空题
modify
单项选择题
A．Employ them as lab assistants.B．Teach chemistry classes at their high school.C．Help them with their studies.D．Pay them for participating in the study.
A．Employ them as lab assistants.
B．Teach chemistry classes at their high school.
C．Help them with their studies.
D．Pay them for participating in the study.
相关试题