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【单选题】
在元素周期表中,同一主族元素,从上到下性质递变叙述错误的是( )A.
元素的金属性逐渐增强
B.
元素的非金属性逐渐减弱
C.
原子半径逐渐减小
D.
元素的电负性逐渐减小
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反馈参考答案：
举一反三
【简答题】阅读下面的短文，根据上下文意义和所给单词首字母，写出标有题号每小题空白处适当单词完全、 正确形式。 In the (1)d waiting room, sick people were sitting on their chairs. Jack, a school-boy, was among them. They all looked sad (2)e Jack. He was reading ...
【简答题】Hearing the interesting story,all the people present ____ ____ r (突然大笑起来).
【单选题】In the following introductory paragraph, what kind of motivator does the author apply? “No union is more profound than marriage, for it embodies the highest ideals of love, fidelity, devotion, sacrifi...
A.
An interesting statement
B.
Quotations
C.
A brief story
D.
The opposite opinion
【单选题】In the following introductory paragraph, what kind of motivator does the author apply? “No union is more profound than marriage, for it embodies the highest ideals of love, fidelity, devotion, sacrifi...
A.
A brief story
B.
Quotations
C.
An interesting statement
D.
The opposite opinion
【简答题】Once a _____ told me an interesting story. /'tʊərɪst/
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