饮水加氟防龋效果乳牙比恒牙低是因为 -题库考试答案搜索网

饮水加氟防龋效果乳牙比恒牙低是因为

单选题

2021-09-01 19:30

A、氟不容易与乳牙牙釉质结合
B、恒牙矿化时孕妇摄氟不足
C、氟不能完全通过胎盘屏障
D、恒牙矿化程度高于乳牙
E、以上都是

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正确答案

D

试题解析

标签：文才遵义医科大学预防口腔医学

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翻译：With Average or With Particular Average（WA or WPA）（）

比值比（OR）

（）shall be liable for loss of and damage to the Vessel and／or goods arising or resulting from inaccuracies in stating the description，quantity，weight，measurement or contents.

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

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