分析 三月十六日是世界睡眠日.今年的口號是"呼吸輕松,睡個好覺".充足的睡眠有助于身體和大腦生長的發(fā)育.根據調查成人需要每晚睡九小時.10至17歲的學生,大約需要是八到九小時.但許多學生沒有得到足夠的睡眠,因為他們有繁重的家庭作業(yè).這些睡眠問題對人的生活有很大的影響.專家表明,青少年缺乏睡眠將導致成績差,同時,缺乏睡眠也會使他們沮喪.
解答 12.B 細節(jié)理解題.根據第二段的For studentsaged 10 to 17,a healthy amountis about eight to nine hours per night.可知,對于10至17歲的學生,健康的睡眠數量大約是每晚八到九個小時.故選B.
13.C 細節(jié)理解題.根據第四段的Students withoutenough sleep cannot pay attention in class or do well in sports.Also,the lack ofsleep may make them depressed (沮喪的).可知,沒有足夠睡眠的學生在課堂上不能集中注意力,也不能在運動中表現良好,而且,睡眠不足可能使他們沮喪.所以睡眠不足的青少年可能會感到沮喪,故選C.
14.D 詞義猜測題.根據后面的定語從句which might keepthem awake all night可知,能讓他們保持整夜清醒的應是"失眠癥",故選D.
15.C 細節(jié)理解題.根據最后一段的Some of thesegood habits include avoiding drinks that make people excited late in the day,going to sleepat the same time each night,and sleeping in a comfortable place that is dark,quiet,and neither toowarm nor too cold.可知,這些良好的習慣包括:避免讓人興奮的飲料,在每晚同一時間睡覺,睡在一個黑暗、安靜、既不太熱也不太冷的舒適的地方.故選C.
點評 本文是歷史文化類閱讀,主要考查細節(jié)理解題和推理判斷題.在做細節(jié)理解題時,首先根據題目要求迅速在文章里找出相應的段落、句子或短語.認真比較選項和文中細節(jié)的區(qū)別,在做推理判斷題時不要以個人的主觀想象代替文章的事實,要根據文章事實進行合乎邏輯的推理判斷.
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