add rust usage domains

data/1.rust初阶/1.预备知识/1.rust简介/config.json

@@ -51,6 +51,7 @@
   ],
   "export": [
       "helloworld.json",
-      "historyofrust.json"
+      "historyofrust.json",
+      "rust_domains.json"
   ]
 }
\ No newline at end of file

data/1.rust初阶/1.预备知识/1.rust简介/historyofrust.json

 {
   "type": "code_options",
-  "author": "maozhonggui",
+  "author": "jacky_rust",
   "source": "historyofrust.md",
-  "notebook_enable": true,
+  "notebook_enable": false,
   "exercise_id": "7e6ebda86d1e44b7974f719f08c24c7e"
 }
\ No newline at end of file

data/1.rust初阶/1.预备知识/1.rust简介/rust_domains.json

+{
+  "type": "code_options",
+  "author": "jacky_rust",
+  "source": "rust_domains.md",
+  "notebook_enable": false
+}
\ No newline at end of file

data/1.rust初阶/1.预备知识/1.rust简介/rust_domains.md

+# Rust 的应用领域
+
+Rust 语言应用领域广泛，在命令行工具、WebAssembly、网络编程、嵌入式、系统编程、数据库等等各种领域都有很好的应用。
+
+RustMagazine 在[2021年六月刊](https://rustmagazine.github.io/rust_magazine_2021/chapter_6/hots.html)介绍了一个Rust 在艺术领域的商业应用案例 MORPH，该艺术项目使用486步进电机，86,000个LED和5通道颗粒式合成引擎，控制软件系统使用 Rust 实现，利用的是 nannou 和 koto。  
+
+![Rust usage on a commercial art project](./rust_embedded.png)
+
+以上案例展示了 Rust 在哪方面的应用？ 以下选项最准确的是：
+
+## 答案
+
+```rust
+fn main(){
+    let rust_usage_domains = ["命令行工具", "WebAssembly", "网络编程", "嵌入式", "系统编程", "数据库", "区块链"];
+    for domain in rust_usage_domains {
+        if domain.contains("嵌入式") || domain.to_lowercase().contains("embedded") {
+            println!("{}", domain);
+        }
+    }
+}
+```
+
+## 选项
+
+### A
+
+```rust
+fn main(){
+    let rust_usage_domains = ["命令行工具", "WebAssembly", "网络编程", "嵌入式", "系统编程", "数据库", "区块链"];
+    println!("{:?}", rust_usage_domains);
+}
+```
+
+### B
+
+```rust
+fn main(){
+    let rust_usage_domains = ["命令行工具", "WebAssembly", "网络编程", "嵌入式", "系统编程", "数据库", "区块链"];
+    loop {
+        if domain.includes("嵌入式") || domain.includes("embedded") {
+            println!("{}", domain);
+        }
+    }
+}
+```
+
+### C
+
+```rust
+fn main(){
+    let rust_usage_domains = ["命令行工具", "WebAssembly", "网络编程", "嵌入式", "系统编程", "数据库", "区块链"];
+    for domain in rust_usage_domains {
+        println!("{}", domain);
+    }
+}
+```
+
+<!--
+参考链接：  
+https://rustmagazine.github.io/rust_magazine_2021/chapter_6/hots.html  
+https://t.me/rust_daily_news/4863  
+https://twitter.com/nburdy/status/1360220925820604419  
+https://www.dw.com/en/the-kinetic-super-sculpture/av-58618165  
+-->