我需要遵循什么类型的语法? angular V2还是angular V4？

Question

我是新来的离子和角度。我已经使用命令npm install -g cordova ionic安装了cordova和ionic。我已经检查了package.json，它显示在下面

"@angular/common": "4.1.2",
"@angular/compiler": "4.1.2",
"@angular/compiler-cli": "4.1.2",
"@angular/core": "4.1.2",
"@angular/forms": "4.1.2",
"@angular/http": "4.1.2",
"@angular/platform-browser": "4.1.2",
"@angular/platform-browser-dynamic": "4.1.2",
"@ionic-native/core": "3.10.2",
"@ionic-native/splash-screen": "3.10.2",
"@ionic-native/status-bar": "3.10.2",
"@ionic/storage": "2.0.1",
"ionic-angular": "3.3.0",
"ionicons": "3.0.0",
"rxjs": "5.1.1",
"sw-toolbox": "3.6.0",
"zone.js": "0.8.11"

请告诉我我将使用angular 2语法还是angular 4语法？并指导我如何在angular 2上安装ionic。