# 十万个为什么（精选）

> 十万个为什么（精选） (iPhone/iPad app by Shanghai Yuanhao Information Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/id1037272022 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Yuanhao Information Technology Co., Ltd.](https://appshunter.io/developer/697767253)
- Category: Education, Reference
- Price: $0.99
- Rating: 1.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 7 MB
- Languages: Chinese (Simplified, China)
- Released: 2015-09-15
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/id1037272022/reviews.md

## What is 十万个为什么（精选）?

精选二千七百多条知识，详细全面；
十一大分类，科目清晰，便于查阅；
涵盖各方领域，满足各类疑问需求；
并且新添复制收藏功能，实用方便。

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/id1037272022/reviews.md

### 1/5 — 资料错误了还发出来

*2019-08-03, version 1.2*

「空气为什么不空」在这个类别里写了：为什么空气并不“空“?
　　在1771年，瑞典药剂师舍勒将一块橡皮似的白磷，扔进一个空瓶子。白磷是个脾气暴躁的家伙，它平白无故就会”发火”一一在空气中自燃。舍勒发现，白磷燃烧之后，瓶子中失去了约1/5的气体，而且小老鼠在剩余的气体中很快死亡。这件事引起了法国化学家拉瓦锡的注意。他进行了详细的研究，最后得出结论：那失去的1/5气体，叫做“氧气”，剩下的是不助燃的”氧气”。现在测定，干燥空气中氧气约占21%，\\\氨气\约占78%\\\，其他气体约占1%。所以空气并不是”空”的。       事实是氮气含量78%，氨气这么高的话人都死了

## Version history (last 3 releases)

### 1.3 — 2020-07-16

1、优化界面显示问题
2、修复若干BUG

### 1.2 — 2015-10-01

修复Xocde 引起的BUG

### 1.0 — 2015-09-15

No release notes.

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All apps by Shanghai Yuanhao Information Technology Co., Ltd.: https://appshunter.io/developer/697767253

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*