元素周期表是学习化学的重要工具。右下图是元素周期表中的一格，从中获取的信息不正确的是_刷题宝

题干

元素周期表是学习化学的重要工具。右下图是元素周期表中的一格，从中获取的信息不正确的是（）

A：该元素的元素符号为Ar

B：该元素的原子核外有18个电子

C：该元素的相对原子质量为39.95g

D：该元素属于稀有气体元素

上一题下一题 0.0难度选择题更新时间:2019-03-10 10:39:51

答案(点此获取答案解析）

C

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2017年将要竣工的福建龙岩大桥，超过了法国的本艾因大桥成为世界上最重的转体结构大桥，如图1所示。高架桥限速60km/h，主桥长340m，引桥总长1449m。

同类题2

将基因型为Aa植株的花粉和基因型为Bb植株的花粉，除去细胞壁后，进行原生质体融合（仅考虑两两融合），可以得到多少种基因型不同的融合细胞

同类题3

任务型阅读

　　At present, there is much homework for American students. But home is not a good place for students to do their homework. So there come Homework Clubs. And they are more and more popular in America.

What is the Homework Club?

The Homework Club is a good place for students to do their homework. It is very quiet. A teacher will help students prepare for the tests there. The teacher is not to teach students but to give them help when they need.

Where is the Homework Club?

The Homework Club is usually in a library or in a classroom. It is a popular activity after school every day. If there is no school that day, Homework Clubs will NOT meet.

What will students do in the Homework Club?

In the Homework Club, the students will do their homework for the first hour and then they will draw pictures or play football.

根据短文内容填空。

同类题4

在每天摄入的能量中，早、中、晚餐的能量比例分别是（　　）

同类题5

等腰三角形的一个角是70°，它的底角的大小为（）

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