题干

下列叙述错误的是(  )

A:分子、原子和离子都能直接构成物质

B:原子中原子核与核外电子的电量相等,电性相反,因而原子不显电性

C:决定原子质量大小的主要是质子和电子

D:原子如果得到或失去电子就变成离子

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答案(点此获取答案解析)

C

同类题4

阅读下面的材料,从每题所给的A、B、C、D三个选项中,选出最佳选项回答问题或完成句子。

D

    Nowadays, phone calls and messages help us communicate with others more often. It means that we seldom write letters now. But a TV show. Letters alive, is bringing back this old habit.

    Letters Alive invites famous actors and actresses but there are no funny jokes or different competitions. Instead, only one person walks up to a microphone and reads a letter. The letters were written by people from different times in history. For example, in one episode(集), they read a letter written by the famous writer Xiao Hong to her younger brother in 1941. The letter shows that Xiao Hong missed her brother so much and had great hopes for his future.

    “Every letter opens another world for us, " said Guan Zhangwen, the director of the TV show. “It seems that we can experience the real lives and feelings of the writers". Since its first episode on December 5, 2016, Letters Alive has been widely praised. Many audiences(观众)say that it has provided a breath of fresh air to today's TV shows.

    Besides Letters Alive, some other cultural TV shows have also attracted(吸引)Chinese audiences. They include the Chinese Poetry Conference, a traditional Chinese poetry competition and Readers, a program that invites people to read poems and articles they like or wrote. It suggests that cultural values and true feelings are becoming our interest.