下列叙述中错误的是 [ ]
A.原子半径:Cl>S>O
B.还原性:Na>Mg>Al
C.稳定性:HF>HCl>HBr
D.酸性:HClO4>H2SO4>H3PO4
答案:A
根据要求完成句子。
1. Li Lei is taller than Lin Tao. Li Lei is stronger than Lin Tao.(合为一句)
Li Lei is than Lin Tao.
2. John and Mike are in the same class.(改为一般疑问句)
John and Mike the class ?
3. Did you clean the room ?(作否定回答)
4. I have a fever.(就划线部分提问)
92表示含碳在0.2%,含铬在9%左右。