A不干扰氟防龋作用
B长期应用不影响或破坏口腔微生物的生态平衡
C不产生抗药性
D不使酵母菌落过度生长或外源性微生物植居于口腔内
E具有以上各个方面
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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6岁以下儿童刷牙时每次含氟牙膏的用量为()。
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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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