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【简答题】
“绿叶在光下制造有机物”实验，实验的步骤包括： ①暗处理 ②选叶遮光 ③酒精脱色 ④清水冲洗 ⑤滴加碘液 ⑥观察变化 （1）酒精脱色时为什么要隔水加热？______． （2）滴加碘液的目的是检验光合作用制造的有机物是什么？______．
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反馈参考答案：
举一反三
【判断题】We put the index finger and mid-finger apart with palm the receiver to mean "OK", which was first used by Winston Churchill.
A.
正确
B.
错误
【判断题】We put index finger and mid-finger apart with palm against the receiver to mean “OK”, which was first used by Winston Churchill.
A.
正确
B.
错误
【简答题】(B4.2A) 16 = ( ) 2
【判断题】We put the index finger and mid-finger apart with palm against the receiver to mean “OK,” which was first used by Winston Churchill.
A.
正确
B.
错误
【单选题】Which index used by insurance companies is not mentioned in this passage?
A.
Gender.
B.
Age.
C.
Life expectancy.
D.
Matrimony.
【判断题】We put the index finger and mid-finger apart with palm against the recerver to mean "OK," which was first used by Winston Churchill.
A.
正确
B.
错误
【简答题】(B4.2A) 16 转换为二进制数是 ( ) 2
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