什么是核型（karyotype）？
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The full title of the U.K. is the United Kingdom of （）and （）
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public and private colleges and universities and community colleges offer（）.
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（）is used for calling and replying,and for transmitting acknowleding and relaying distress alerts.
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The way in which people address each other depends on their age, sex, social group and personal relationship. The English system of address forms frequently used includes first name, last name, title+last name, （）, and kin term.
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Solid waste generation，and electricity and water consumption are costly and have their own set of environmental（）.
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Whose duty is it to examine and verify the vessel’s classification and technical state and condition?（）.
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画出该段指令程序对应的梯形图。 LD NOT 0000 LD 0001 AND 0002 LD NOT 0003 AND 0004 OR LD AND LD TIM 00 #0030 LD 0005 AND 0006 OR NOT 0007 OUT 0500
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The safety of the port should（）in respect of a vessel properly manned and equipped，and navigated and handled without negligence and in accordance with good seamanship.
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