正确答案: B

铁、铜、铝等金属材料都能够被磁化

题目：关于磁体和磁场，以下说法中错误的是

解析：B

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学习资料的答案和解析：

[单选题]运载火箭的主要燃料是偏二甲肼（用R表示），其反应的化学方程式为：R + 2N2O4 == 3N2 + 4H2O + 2CO2，则偏二甲肼的化学式是

[单选题]下列词语中有错别字的一项是

亵读 憔悴 顾名思意 肃然起敬

[单选题]Which of the following is not talked in the passage as which can help us communicate?

newspapers

[单选题]have a sore throat． __________ you should see a doctor．

Maybe

[单选题]2． Lily and Lucy often leave__________ school __________ half past seven．

for，at

[单选题]There are many clouds coming，it_________ rain soon．

is going to

[单选题]24． What would happen to a student who often goes to bed late and gets up early?

He would fall asleep in class．

解析：24.A【解析】睡得晚、起得早的学生，很可能上课睡觉，故选A。