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【简答题】
One day a man saw an old lady standing by her expensive car, clearly in need of help. So he stopped his old truck and got out. Although he was smiling, the old lady was worried. Was he gong to hurt her? He didn’t look safe. The man could see that she was frightened, so in his friendliest voice he said, “I’m here to help you, madam. Why don’t you wait in the car where it’s warm? By the way, my name is Bryan Anderson.” Bryan quickly fixed the car and the lady thanked him. Then she asked how much she should pay him. But Bryan wanted no money. He was just giving a hand to someone in trouble. This was normal for him. He said, “If you really want to repay me, next time you see someone in need, help them and think of me.” After saying goodbye, the lady continued down the road until she reached a small café where she decided to stop for something to eat. As the pretty waitress took her order, the lady noticed she was nearly eight months pregnant(怀孕). Although the waitress looked tired she was very kind. As the lady was going to pay the $10 bill she remembered Bryan’s words. She paid with a hundred-dollar bill. But when the waitress returned with the change the lady was gone. On the table she saw a small note. There ware tears in her eyes when she read it : “Somebody once helped me the way I’m helping you. If you want to pay me back, continue being kind to others.” Under the note were nine more $100 bills. Was the old lady an angel? The waitress was so excited that she called her husband to tell him the news. “Bryan Anderson my dear…you’re not going to believe what just happened…” 小题1:When the lady saw Bryan, she was worried because she thought_____ . A.he may hurt her B.he wasn’t going to stop C.he couldn’t help her D.she didn’t have enough money 答案: A
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【判断题】SS7E型电力机车在制动工况时,恒功率速度范围为96~170km/h。
A.
正确
B.
错误
【单选题】用0.1000mol/L NaOH标准溶液滴定20. 00ml.0. 1000mol/L HAc溶液,达到化学计量点时,其溶液的pH ( )。
A.
pH<7
B.
pH> 7
C.
pH=7
D.
不确定
【简答题】实验室需要450ml 0.12mol/L 的NaOH溶液,有如下操作: ①把称好的NaOH放入小烧杯中,加适量蒸馏水溶解 ②根据计算用托盘天平称取NaOH 克 ③把①所得溶液小心转 入一定容积的容量瓶中 ④继续向容量瓶中加蒸馏水至液面距刻度线1cm-2cm处,改用胶头滴管小心滴加蒸馏水至溶液凹液面与刻度线相切 ⑤用少量蒸馏水洗涤烧杯和玻璃棒2-3次,每次洗涤的液体都小心转入容量瓶,并轻轻摇匀。 ⑥...
【简答题】移动通信的发展趋势 是什么?
【单选题】下列不属于通信的发展趋势的是( )
A.
数字化,智能化
B.
高速化,宽带化
C.
综合化,移动化
D.
公众化
【判断题】宽带移动化”是移动通信发展的趋势之一。
A.
正确
B.
错误
【简答题】(12分)实验室需要450ml 0.12mol/L 的NaOH溶液,有如下操作: ①把称好的NaOH放入小烧杯中,加适量蒸馏水溶解。 ②根据计算用托盘天平称取NaOH 克。 ③把①所得溶液小心转 入一定容积的容量瓶中。 ④继续向容量瓶中加蒸馏水至液面距刻度线1cm-2cm处,改用胶头滴管小心滴加蒸馏水至溶液凹液面与刻度线相切。 ⑤用少量蒸馏水洗涤烧杯和玻璃棒2-3次 ,每次洗涤的液体都小心转入容量...
【简答题】(8分)实验室用固体烧碱配制480mL 1mol/L NaOH溶液。 (1)需称量 g的烧碱固体,固体应放在 中称量。 (2)配制过程中,不需要使用的仪器是(填写代号 ) 。 A 烧杯    B 量筒        C 1000mL容量瓶     D 玻璃棒 E 漏斗    F 胶头滴管    G  500mL试剂瓶 (3)根据实验的实际需要和(2)中列出的仪器判断,完成实验还缺少的仪器是 ; (...
【单选题】教育技术是以视听教育为基础,下面属于视听教育媒体的是( )
A.
幻灯片
B.
广播
C.
有声电影
D.
无声电影
【多选题】移动通信的发展趋势是?
A.
微型化
B.
巨型化
C.
网络化
D.
多媒体化
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