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【判断题】
心肺复苏前无须判断环境安全，做好自我防护A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】视网膜由外向内依次是__________、__________、__________和__________。
【简答题】与十进制数100等值的十六进制数是____,八进制数是____,二进制数是____。
【单选题】To turm the cell phone on as soon as it gets wet. B) To take out the battery and the SIM card as quickly as possible. C) To dry the wet cell phone with a paper towel. D) To put the SIM card and the ba...
A.
To turm the cell phone on as soon as it gets wet.
B.
To take out the battery and the SIM card as quickly as possible.
C.
To dry the wet cell phone with a paper towel
D.
To put the SIM card and the battery into a bag full of dry rice.
【多选题】1-1-2有机化合物的特性有哪些?
A.
有机化合物数量多
B.
挥发性大、熔点、沸点高
C.
热稳定性差、能燃烧
D.
易溶于水，难溶于有机溶剂
E.
反应速度比较快
F.
反应产物复杂，副反应较多
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