关于21-三体综合征下列哪项不正确() A.通贯掌是确诊依据之一 B.属于常染色体畸

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问题:

关于21-三体综合征下列哪项不正确()

A.通贯掌是确诊依据之一

B.属于常染色体畸变

C.特殊面容

D.智力低下

E.活婴中发生率约1/600~800

考点:贵州住院医师儿科儿科住院医师综合练习儿科住院医师综合练习题库
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根据短文和首字母提示完成单词。

     The boy is a (1)s________. His (2)n_________ is Tian Ling. This is (3)h________ classroom. It's

an room. These are small (4)n________ desks for the students. (5)T_________ new. That big one is (6)

o_________. It's (7)f________

the teachers.

     Tian Ling's books are on his desk. (8)W_________ is his bag? It's on his desk. He is twelve. Meimei

and Yangyang are his classmates. They are twelve, (9)t_________.  Meimei is from Shanghai and

Yangyang is from America. They are (10)n__________.

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环境中影响生物生活的各种因素叫做生态因素,它分为___________和_____________。

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价值观对人们的行为起着重大的导向和促进作用。 [ ]

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某实验室把氢氧化钠浓溶液暴露在空气中一段时间,实验员猜测氢氧化钠浓溶液已部分变质.于是他进行了以下实验:

实验目的实验步骤实验现象结论及解释

(写出化学方程式)

检验是否变质方法1:取样,向样品只加入适量的稀盐酸产生无色气体
方法2:取样,向样品中加入了一种碱溶液_____________产生白色沉淀
方法3:取样,向样品中加入一种盐溶液 ______________产生白色沉淀
除去杂质1.加入适量的____白色沉淀此空不填写
2.______________此空不填写此空不填写
结论:氢氧化钠浓溶液暴露在空气中一段时间______.

题型:单项选择题

试论述球童工作内容规范

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