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【单选题】
在什么速度下粒子的动量等于非相对论动量的两倍?A.
;
B.
C.
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】指北针符号,圆用细实线绘制,圆的直径正确的是 mm
【多选题】Which of the following statements about the British Empire are True?
A.
It covered almost a quarter of the Earth's total land area.
B.
It was an empire which covered the most area in the history.
C.
Its political,legal,linguistic and cultural legacy is widespread.
D.
It was often described as "the empire on which the sun never sets".
【多选题】Which of the following statements about the British Empire are True?
A.
It was an empire which covered the most area in the history
B.
It covered almost a quarter of the Earth's total land area.
C.
Its political,legal,linguistic and cultural legacy is widespread.
D.
It was often described as "the empire on which the sun never sets".
【多选题】Which of the following statements about the British Empire are True?
A.
It ruled about one-fifth of the world's population at its height.
B.
It covered almost a quarter of the Earth's total land area.
C.
Its political,legal,linguistic and cultural legacy is widespread.
D.
It was often described as "the empire on which the sun never sets".
【多选题】Which of the following statements about the British Empire are True?
A.
It ruled about one-fifth of the world's population at the time.
B.
It covered almost a quarter of the Earth's total land area.
C.
Its political,legal,linguistic and cultural legacy is widespread.
D.
It was often described as "the empire on which the sun never sets".
【单选题】指北针符号的圆用细实线绘制，其直径为（）mm，指北针尾部的宽度宜为（）mm。
A.
24mm；3mm
B.
21mm；3mm
C.
180mm；2mm
D.
150mm；2mm
【单选题】病人，男性，63岁。既往大便困难，3-4天一次，大便干结，无腹泻、便血，无冠心病史。此次突发腹部疼痛，伴停止排便排气，无呕吐。体格检查：腹部膨隆，以左下腹明显，可见巨大肠型，叩诊为鼓音，肠鸣音活跃，无移动性浊音，指诊直肠空虚，指套有血迹。为进一步诊断，可行哪项检查
A.
血常规检查
B.
腹部B超
C.
选择性动脉造影
D.
X线钡灌肠
E.
血、尿淀粉酶
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