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【单选题】
下列选项哪个是数据库系统中最早出现的数据模型?
A.
层次模型
B.
网状模型
C.
关系模型
D.
面向对象模型
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参考答案:
举一反三
【单选题】下列因素,对能量代谢影响最为显著的是:
A.
寒冷
B.
精神活动
C.
肌肉活动
D.
进食
【简答题】单词拼写。 1. She went upstairs and f_______  her son playing computer s. 2. It's h_______  than yesterday. Would like to go swimming? 3. Now we have to get t_______  the exams. 4. Please don’t get the...
【单选题】麻醉中的手术病人发生溶血性反应最早征象是
A.
寒战、高热
B.
伤口渗血和低血压
C.
面部潮红、出现荨麻疹
D.
呼吸困难、喘鸣
【单选题】麻醉中的手术病人发生溶血性反应最早征象是
A.
寒战、高热
B.
伤口渗血和低血压
C.
呼吸困难、喘鸣
D.
面部潮红,出现荨麻疹
【简答题】按要求选择恰当的选项。 1. 医生要检查你的喉咙,会让你张开嘴,可以说: [     ] A. Open your mouth. B. Close your mouth. 2. 这是一块橡皮,可以说: [     ] A. What's this? B. This is an eraser. 3. 出示一支铅笔可以说: [     ] A. Show me a book. B. Show me a...
【简答题】Never open your mouth_________.
【单选题】下列因素,对能量代谢最为显著的是( )
A.
寒冷
B.
精神活动
C.
肌肉活动
D.
进食
【简答题】完形填空。 Two friends went to a city and 1 in a big hotel. Their room was on the 56th floor, and there was a fast lift, so they went up and down very 2 . They came back to the hotel very late one Saturday...
【单选题】He sleeps with his eyes _______ and mouth ________.
A.
close; open
B.
close; opened
C.
closed;opened
D.
closed;open
【单选题】Close your mouth when eating.
A.
Dos
B.
Don'ts
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