问题
单项选择题
固态直接变成气态的物理现象称为（）
A.凝华
B.升华
C.汽化
D.蒸发
答案
参考答案：B
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固态直接变成气态的物理现象称为（）
A.凝华
B.升华
C.汽化
D.蒸发
参考答案：B
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| Father: For the last time, you cannot have your ears pierced. I don't want to talk about it 1 . Son: But, Dad, all the other guys (哥们儿)… Father: I don't care about"all the other guys." I don't care 2 they do or don't do. That's up to them and their 3 . I care about you. And you cannot have your ears pierced (make a hole in one's ear), and that's 4 . The subject is closed. Now go do your homework. Son: But, Dad, I just want to have 5 ear pierced. Father: That's the most ridiculous thing I have ever heard of! Piercing just 6 ! That's crazy! People will 7 you're crazy! I think you've lost your mind. Son: It's not crazy. It's the style (风格), Dad. All the guys have just one ear pierced. That's the 8 it's done. It's cool, Dad. Sometimes they have three or four holes in one ear ― 9 in just one ear. It looks great! I want to be in style. I want to be like the other guys. Father: Stop here. Just 10 it ― and go do your homework. If you spent as much time thinking about math as you do about earrings, you would be at the top of your class. | ||||
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[化学——选修物质结构与性质](15分)
原子序数依次增大A、B、C、D、E、F(A、B、C、D、E、F分别代表元素符号)六种短周期元素。元素A的原子半径在短周期中最小，元素C的单质在空气中含量最多，
比
少一个电子层，E所在周期的各元素单质沸点变化如下图(元素按原子序数递增顺序连续排列)，B、C两种元素分别能与A形成等电子的
甲、乙两种分子，且两种
分子中各原子的个数见下表：
| 化合物 | 甲 | 乙 |
| 原子个数比 | B：A=1：4 | C：A=1：3 |
(2)分子甲的空间构型为 ，该分子中B的
原子轨道发生的是 杂化。
(3)E单质属于 晶体，E与A元素形成 分子(填“极性”或“非极性”)
(4)D在F中燃烧的产物属于 晶体，其晶体中与最近且等距离的有 个。
(5)C元素的第一电离能(
) 氧元素的第一电离能()(填“<”或“>”或“=”)。