空气中加热,铜会变成黑色的氧化铜.
2Cu+O2==2CuO
猜你喜欢
- 1若a=21−(−1)m(m为正整数),且a、b互为相反数,b、c互为倒数,则ab+bm-(b-c)2m的值为( ) A.0 B.-1 C.-2 D.0或-2
- 2Jenny has two brothers and one sister.(对划线部分提问) ____ ____brothers and sister____Jenny have?
- 3what are you doing? 的中文是什么?
- 4the information technology has greatly __people's life
- 5.在观察草履虫的实验中,用来观察的液滴应取自培养液的( ),因为(
- 6把一根长9分之8米的钢筋锯成每段长9分之2米的若干分,一共锯几次?
- 7描写花草的古诗
- 8含400个碱基的DNA分子,碱基对的排列方式有多少种?这类题型如何算?
- 9after the match,Tom became so angry at the result that he kicked footballs in the gym hall______.
- 10( )精图( )补充词语