一块三角形的地,量得它的底长是36.5米,高是15.2米.这块地的面积是多少?
36.5×15.2÷2
=554.8÷2
=277.4(平方米)
答:这块地的面积是277.4平方米.
成人骨髓总量平均约()g。
A.2000
B.2500
C.2700
D.2900
E.3000
It was playing computer games______ cost the boy plenty of time_____ he ought to have spent doing his homework.
A.that; that
B.which; that
C.which; when
D.that; when