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单项选择题

已知某元素原子的价电子层为3s23p5，则该元素在元素周期表中的位置为（）

A.第三周期第IIA族
B.第三周期第IIB族
C.第三周期第VIIA族
D.第三周期第VIIB族
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多项选择题
About the collection methods of environmental protection tax, which of the following statements are correct:().
A、Environmental protection tax is a special tax that is levied on specific acts of pollution and damage to the environment, for the purpose of environmental protection.
B、Other general taxes taken for the purpose of environmental protection are tax regulation measures.
C、Tax regulation measures include various tax incentives taken to encourage taxpayers to control pollution and protect the environment.
D、Certain measures were taken to increase their tax burden for acts of polluting and damaging the environment.
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胎儿侧脑室宽度为8mm是否正常
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