在一个工作场所内不应只采用()照明方式。
A.一般
B.分区一般
C.局部
D.混合
参考答案:C
关节的结构包括( )
A.关节面、关节囊、关节头
B.关节头、关节囊、关节腔
C.关节面、关节囊、关节腔
D.关节头、关节窝、关节腔
—What else did you do this morning besides doing the shopping?
—Two hours__________washing the windows and the floor.
A.were taken
B.was spent
C.has taken
D.will be spent