若节约600元记作+600元,则浪费800元记作( )元。
-800
Although the cyclist was unhurt, his bicycle was()between the lorry and the wall.
A.crushed
B.clapped
C.split
D.cracked
可锻铸铁中的石墨呈团絮状,因此具有较好的()
A、塑性和韧性
B、耐高温性
C、抗拉强度
D、耐腐蚀性