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【单选题】
实验室制取氯化氢的方法是( )A.
氯化钠溶液与浓硫酸加热反应
B.
氯化钠溶液与稀硫酸加热反应
C.
氯化钠晶体与稀硫酸加热反应
D.
氯化钠晶体与浓硫酸加热反应
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【单选题】Don't leave matches or cigarettes on the table within the______of little chil-dren.
A.
hand
B.
reach
C.
space
D.
distance
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【单选题】The second paragraph mainly tells us that ______
A.
parents should be strict with their children
B.
parental controls reflect only the needs of the parents and the values of the community
C.
parental restrictions vary, and are not always enforced for the benefit of the children alone
D.
parents vary in their strictness towards their children according to the situation
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