搜题请搜索小程序“爱下问搜题”
问题 选择题

下列反应既不属于化合反应又不属于分解反应的是（　　）

A．铁+硫酸-→硫酸亚铁+氢气

B．氧气+一氧化碳

点燃
二氧化碳

C．氢气+氯气

点燃
氯化氢

D．水

通电
氢气+氧气

答案

答案：A

听力题

根据短文意思及首字母提示，在空白处填入一个适当的单词，使短文通顺、完整。

Hello! Come and buy your clothes at Fangfang’s great s      (1)! Do you like skirts? We have skirts at a very good p        (2)—only ￥5. Do you w       (3) to buy bags? We also have great bags for only ￥10! You can b       (4) sweaters in red, green, and white for only ￥28! We also have sports socks for only ￥5 each! What other things do you n      (5)? Come and see for yourself.
查看答案
问答题 简答题

打桩机底座的拆卸和安装作业时，需要进行敲击作业，为避免铁屑飞溅，作业人员应采取怎样的防护措施？
查看答案