皮皮学，免费搜题
登录
搜题
【简答题】
（7分）金属与我们生活息息相关，按要求回答问题。 （1）下列物质属于合金的是 。 A．氧化铁 B．不锈钢 C．黄铜 D．硫酸铜 （2）下列金属制品的用途与其性质不存在决定关系的是 。 （3）工业上用赤铁矿（主要成分为氧化铁）炼铁的化学方程式是 ，钢铁制品在 时容易生锈，用盐酸除铁锈的化学方程式是 。 （4）将一定量铁粉加入到硫酸铝、硫酸铜的混合液中，充分反应后过滤。滤液中的溶质是_______。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】10 years ago， _________ only one classroom building in our school. And in 10 years， _________ five classroom buildings in our school.
A.
there will be, there are
B.
there was, there will be
C.
there will be; there was
D.
there was, there are
【单选题】Our town has been added to these years. It is no longer ________ it was 15 years ago, ________ it was poor and untidy.
A.
what; which
B.
that; which
C.
which; that
D.
what; when
【单选题】Our teacher ____ in our school for 29 years and he ____ here when he was 23 years old.
A.
has taught has come
B.
taught , comes
C.
taught , came
D.
has taught, came
【单选题】Our math teacher ______ in our school for 20 years and he ______ here when he was 23 years old. [ ]
A.
has taught, has come
B.
taught, comes
C.
taught, came
D.
has taught, came
【简答题】如图所示电路中,方框代表电源或电阻,各支路上电流的参考方向如图所示,则I1=( ),I2=( )。
【单选题】No one knows what _______ in fifty years.
A.
will our life be like
B.
is our life like
C.
our life will be like
D.
our life is like
【简答题】如图所示的电路，求电流i 1 和i 2 。
相关题目：