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【单选题】
对物理量的估测，是一种良好的学习习惯，也是学好物理的基本功之一。下列估测的数据中最接近事实的是(     )
A.
小明午餐大约吃5㎏的米饭
B.
家用空调正常工作时的电流约为5A
C.
中学生正常步行的速度约为50m／s
D.
广东各地六月份的平均气温约为50℃
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【单选题】下述图片上的符号是何种元器件的符号?
A.
光电接近开关
B.
磁铁接近开关
C.
发光二极管
D.
单向节流阀
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【单选题】Read and choose the best answer.As more women in the United States move up the professional ladder, more are finding it necessary to make business trips alone. Since this is new for many families, som...
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Working women who have no time for cooking.
B.
Husbands and children of working women.
C.
Working women who must travel on their own.
D.
Hotel personnel who must attend to working women.
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【单选题】下述图片上的符号是何种元器件的符号?
A.
光电接近开关
B.
磁铁接近开关
C.
发光二极管
D.
单向节流阀
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【简答题】Task 3 Read and choose the best answer. In the European Middle Ages breakfast was not usually thought to be necessary and important. In earlier periods, it didn't even exist. Only two formal meals wer...
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【单选题】典型的颈椎有
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棘突不分叉
B.
椎体大呈心型
C.
横突孔
D.
肋凹
E.
椎间隙比较大
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【单选题】体现中国人民的根本利益和要求以及人民战争路线的彻底的抗日纲领的是( )。
A.
《抗战建国纲领》
B.
《抗日救国十大纲领》
C.
《为抗日救国告全国同胞书》
D.
《论持久战》
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【单选题】When using the radar for navigating（）.
A.
the best fix is obtained by using a tangent bearing and a range
B.
and using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearings
C.
and using ranges，the most rapidly changing range should be measured last
D.
and crossing a radar range of one object with the visual bearing of a second object，the two objects should be 80°to 110°apart
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【单选题】下述图片上的符号是何种元器件的符号?
A.
光电接近开关
B.
磁铁接近开关
C.
发光二极管
D.
单向节流阀
查看完整题目与答案
【简答题】Read and choose the best answer. In the European Middle Ages breakfast was not usually thought to be necessary and important. In earlier periods, it didn't even exist. Only two formal meals were had b...
查看完整题目与答案
【简答题】Read and choose the Chinese meaning.（请你选出下列句子的汉语译文) (     )1. The Changjiang River is longer than the Yellow River. (     )2. Polly's hair is shorter than Molly's hair. (     )3. The Great Wall is old...
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【单选题】下述图片上的符号是何种元器件的符号?
A.
光电接近开关
B.
磁铁接近开关
C.
发光二极管
D.
单向节流阀
查看完整题目与答案
【单选题】Read and choose the best answer.As more women in the United States move up the professional ladder, more are finding it necessary to make business trips alone. Since this is new for many families, som...
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【单选题】下述图片上的符号是何种元器件的符号?
A.
光电接近开关
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发光二极管
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【简答题】Task 3 Read and choose the best answer. In the European Middle Ages breakfast was not usually thought to be necessary and important. In earlier periods, it didn't even exist. Only two formal meals wer...
查看完整题目与答案
【单选题】典型的颈椎有
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棘突不分叉
B.
椎体大呈心型
C.
横突孔
D.
肋凹
E.
椎间隙比较大
查看完整题目与答案
【单选题】体现中国人民的根本利益和要求以及人民战争路线的彻底的抗日纲领的是( )。
A.
《抗战建国纲领》
B.
《抗日救国十大纲领》
C.
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D.
《论持久战》
查看完整题目与答案
【单选题】When using the radar for navigating（）.
A.
the best fix is obtained by using a tangent bearing and a range
B.
and using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearings
C.
and using ranges，the most rapidly changing range should be measured last
D.
and crossing a radar range of one object with the visual bearing of a second object，the two objects should be 80°to 110°apart
查看完整题目与答案
【单选题】下述图片上的符号是何种元器件的符号?
A.
光电接近开关
B.
磁铁接近开关
C.
发光二极管
D.
单向节流阀
查看完整题目与答案
【简答题】Read and choose the best answer. In the European Middle Ages breakfast was not usually thought to be necessary and important. In earlier periods, it didn't even exist. Only two formal meals were had b...
查看完整题目与答案
【简答题】Read and choose the Chinese meaning.（请你选出下列句子的汉语译文) (     )1. The Changjiang River is longer than the Yellow River. (     )2. Polly's hair is shorter than Molly's hair. (     )3. The Great Wall is old...
查看完整题目与答案