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【单选题】
若关系模式R∈3NF，则下面最正确的说法是
A.
某个非主属性不传递依赖于码
B.
某个非主属性不部分依赖于码
C.
所有的非主属性都不传递依赖于码
D.
所有的非主属性都不部分依赖于码
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参考答案：
举一反三
【单选题】()最早用实验证明了电磁波的存在。
A.
牛顿
B.
麦克斯韦
C.
爱因斯坦
D.
赫兹
查看完整题目与答案
【简答题】你听过蒲公英梳头的声音么?你听过80只小蚂蚁跑步的声音么?你听过雪花飘落的声音么?请为自己设计一个声音的游戏,如嚼几片脆脆的饼干、几颗硬硬的糖果;揉一团玻璃纸,让它慢慢舒展;分别用筷子小勺敲击几种器皿;认真感觉这些声音,写下悉心倾听后的发现。参考题目:《大自然的声音》、《世界原来是这样的》
查看完整题目与答案
【单选题】在精神障碍的心理、社会因素中，不包括下列哪项
A.
应激性生活事件
B.
人格特征
C.
营养不良
D.
情绪状态
E.
性别
查看完整题目与答案
【单选题】According to the news, what measure did authorities take to fight the flood?
A.
Residents were asked to vacate their homes.
B.
Some routines for the barges have been stopped.
C.
Troops were brought in to help the victims.
D.
Airplanes have been sent to rescue the assets.
查看完整题目与答案
【单选题】What measure did the wild life biologists take to increase the number of bald eagles?
A.
They brought in bald eagles from Canada.
B.
They explored new ways to hatch baby bald eagles.
C.
They developed new types of feed for baby bald eagles.
D.
They found ways to speed up the reproduction of bald eagles.
查看完整题目与答案
【判断题】整流电路负载电流平均值 和交流电源回路总电感 越大,换相过程持续的时间越长。
A.
正确
B.
错误
查看完整题目与答案
【单选题】According to the news, what measure did authorities take to fight the fires?
A.
Troops were brought in to help the firefighters.
B.
Residents were asked to vacate their homes.
C.
Air operations and water drops continued overnight.
D.
Another six fire engines joined the firefighting operation.
查看完整题目与答案
【单选题】The most significant measure we should take to stop terrorists is to______them of material and moral support from within the country.
A.
squeeze
B.
eliminate
C.
prevent
D.
deprive
查看完整题目与答案
【单选题】精神障碍的心理因素、社会因素不包括
A.
应激事件
B.
情绪状态
C.
人格特点
D.
性别
E.
文化程度
查看完整题目与答案
【简答题】翻译以下短语并完成句子。 1. make clothes to one s own measure _____ 2. by measure_____ 3. take measures (steps)to do sth._____ 4. beyond measure_____ 5. be measured in_____ 6. We must _____   to solve these probl...
查看完整题目与答案
相关题目：
【单选题】()最早用实验证明了电磁波的存在。
A.
牛顿
B.
麦克斯韦
C.
爱因斯坦
D.
赫兹
查看完整题目与答案
【简答题】你听过蒲公英梳头的声音么?你听过80只小蚂蚁跑步的声音么?你听过雪花飘落的声音么?请为自己设计一个声音的游戏,如嚼几片脆脆的饼干、几颗硬硬的糖果;揉一团玻璃纸,让它慢慢舒展;分别用筷子小勺敲击几种器皿;认真感觉这些声音,写下悉心倾听后的发现。参考题目:《大自然的声音》、《世界原来是这样的》
查看完整题目与答案
【单选题】在精神障碍的心理、社会因素中，不包括下列哪项
A.
应激性生活事件
B.
人格特征
C.
营养不良
D.
情绪状态
E.
性别
查看完整题目与答案
【单选题】According to the news, what measure did authorities take to fight the flood?
A.
Residents were asked to vacate their homes.
B.
Some routines for the barges have been stopped.
C.
Troops were brought in to help the victims.
D.
Airplanes have been sent to rescue the assets.
查看完整题目与答案
【单选题】What measure did the wild life biologists take to increase the number of bald eagles?
A.
They brought in bald eagles from Canada.
B.
They explored new ways to hatch baby bald eagles.
C.
They developed new types of feed for baby bald eagles.
D.
They found ways to speed up the reproduction of bald eagles.
查看完整题目与答案
【判断题】整流电路负载电流平均值 和交流电源回路总电感 越大,换相过程持续的时间越长。
A.
正确
B.
错误
查看完整题目与答案
【单选题】According to the news, what measure did authorities take to fight the fires?
A.
Troops were brought in to help the firefighters.
B.
Residents were asked to vacate their homes.
C.
Air operations and water drops continued overnight.
D.
Another six fire engines joined the firefighting operation.
查看完整题目与答案
【单选题】The most significant measure we should take to stop terrorists is to______them of material and moral support from within the country.
A.
squeeze
B.
eliminate
C.
prevent
D.
deprive
查看完整题目与答案
【单选题】精神障碍的心理因素、社会因素不包括
A.
应激事件
B.
情绪状态
C.
人格特点
D.
性别
E.
文化程度
查看完整题目与答案
【简答题】翻译以下短语并完成句子。 1. make clothes to one s own measure _____ 2. by measure_____ 3. take measures (steps)to do sth._____ 4. beyond measure_____ 5. be measured in_____ 6. We must _____   to solve these probl...
查看完整题目与答案
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