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【单选题】
若一个命题的结论是 “直线l在平面α内”，则用反证法证明这个命题时，第一假设为 [ ]A.
假设直线l∥平面α
B.
假设直线l∩平面α于点A
C.
假设直线l 平面α
D.
假设直线l⊥平面α
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A.
强调生活的教育意义，并不意味着可以用生活取代教育，因为生活毕竟带有零散性并且还会有消费的东西
B.
限期使用的产品，应当在显著位置清晰地标明生产日期、安全使用期和失效日期
C.
他们在遇到困难的时候，并没有消沉，而是在大家的信赖和关怀中得到了力量，树立了克服困难的信心
D.
根据一个小学校的统计，今年小学生的“人情消费”与去年相比，增加了近一倍左右
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A.
口腔护理用2%的碳酸氢钠溶液
B.
清洗后涂5%的金霉素鱼肝油
C.
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D.
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E.
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A.
口腔护理用10%的碳酸氢钠溶液
B.
清洗后涂5%的金霉素鱼肝油
C.
进餐前可局部涂2%利多卡因
D.
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E.
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There was television, but not in London.
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There was no television anywhere in England.
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A.
nor did it spring
B.
nor does it spring
C.
nor has it sprung
D.
I nor can it spring
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