There are still()charts to be corrected.
A.few
B.a few
C.little
D.a little
参考答案:B
0.8×0.9≈0.72______.
瓷与金属的结合形式中,化学结合约占结合力的()
A.1~1/2
B.1/2~1/3
C.1/3~1/4
D.1/4~1/5
E.1/5~1/6