某金属与盐酸反应时,生成H2的质量与消耗金属质量的关系如下图所示,此金属可能是
A.纯锌
B.纯铁
C.镁铝合金
D.铜铁合金
答案:D
地音监测系统的特点有哪些?
句型转换
小题1:I do my homework at 7:00 in the evening. (改为否定句)
I _______ _______ my homework at 7:00 in the evening.
小题2:I’m from China .(对划线部分提问)
_________ are ________ from?
小题3:Sarah is eleven years old.(对划线部分提问)
________ _________ is Sarah?
小题4:Tony is in Class One. (改为否定句)
Tony ________ _______ Class One.
小题5:This is my photo.(改为复数形式)
These ______ our ________.