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【单选题】
A teenage girl couldn ’ t stand (忍受) her family rules, so she left home. She wanted to be a star and became famous. But she had a little education and 1 years later, she had to ask for food on the street for a living. Now her father has died. Her mother is an old woman. But she is still 2 her daughter. She has been to every corner of the city. Everywhere she goes, she 3 a big photo of her daughter on the wall. At the lower part of the photo she writes, “I still love you ...Come back home!” One day, the daughter saw one of the photos. She was so surprised that she couldn’t believe her 4 . “Is that me?” She moved 5 and read the words, “I still love you...” She cried. She couldn’t wait 6 back home. When she got home, it was early morning. She pushed the door. The door opened itself. She rushed to the bedroom at once. Her mother was sleeping there. She 7 her mother up, “It’s me! Your daughter is back home!” The mother and daughter looked at each other with excitement, full of happy tears. The daughter asked, “ 8 is the door unlocked? A thief could get in.” The mother answered softly, “The door has never locked 9 you left. We miss you all the time. We believe that you’ll come back some day.” As everyone knows, parents love their children forever. Children should also understand their parents and share their happiness, sadness, even everything with their parents. 10 this way, both parents and children can be happy. 1
A.
a little
B.
a few
C.
much
D.
more
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举一反三
【多选题】电子商务发展的三大瓶颈是哪些?
A.
诚信
B.
技术
C.
支付
D.
物流
【判断题】土的渗透性系数表示单位时间内穿透土层的能力。
A.
正确
B.
错误
【简答题】直流电动机的转子又称 ___ ,它产生___电动势,是直流电动机的 ___ 部分。
【判断题】内盘管的液态制冷剂在低温时蒸发吸收吹入内空气中的热量。
A.
正确
B.
错误
【简答题】小杨同学在做“测定小灯泡的电功率”实验时,实验器材齐全并完好,其中电源电压为6伏且不变,待测小灯泡 L 标有“4.5V”字样,且有规格为“20Ω 1A”和“50Ω 2A”的两种滑动变阻器可选。他正确串联实验器材,闭合电键并逐步移动滑片P的位置,观察电压表及电流表的示数,并记录实验数据,部分实验数据如表所示。 1 小杨同学实验中选用的滑动变阻器为____ ___,理由是____ ___。 2 根据表...
【多选题】电子商务发展的三大瓶颈是什么?
A.
资金少
B.
诚信
C.
支付
D.
物流
【多选题】电子商务发展的三大瓶颈分别是
A.
诚信
B.
支付
C.
货源
D.
物流
【单选题】低碳钢的拉伸过程中,胡克定律在()范围内成立。
A.
弹性阶段
B.
屈服阶段
C.
强化阶段
D.
劲缩阶段
【单选题】下图装置可用来测定空气中氧气的含量.对该实验认识不正确的是(  )
A.
铜丝的量不足会影响实验结论
B.
实验中反复推拉针管可使反应物充分接触,使氧气完全反应
C.
加热完后应立即观察体积变化,并记录实验数据
D.
装置不漏气是实验成功的重要因素之一
【多选题】以下对蔗糖水解动力学实验在获取和记录数据过程的说法正确的是()。
A.
该反应体系的最大左旋光度可通过把反应体系置于 6 0 ℃ 恒温环境中 30 分钟后再冷却至室温后测定得到。
B.
测定旋光度时 待旋光仪示数稳定后,应先 记录反应时间 ,再 读取旋光度 。
C.
记录反应开始时间稍微提早或延迟,会影响反应速率 k 的求算结果 。
D.
本实验如果不进行零点校正,会影响反应速率 k 的求算结果 。
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