A:anything important
B:something important
C:important anything
D:important something
Ms Jones has worked here for two years. (改为同义句)
Ms Jones has worked here____two years____.
除去MgO中的Al2O3可选用的试剂是
判断题:芽都能发育成枝条。
要给教室的课程表安装铝合金边框,课程表长20厘米,宽18厘米,需要安装多长的边框?课程表的面积有多大?