【判断题】You need a special cookbook. ( )
【单选题】Do you need _ _ to read on the train? [ ]
【判断题】维生素 D 来源于动物肝脏 鱼肝油 蛋黄类,通过紫外线照射皮肤也可获得。
【简答题】使用Node加载MySQL模块的命令是____。
【简答题】差动放大器的输入、输出的组合方式有四种,分别为单端输入单端输出、单端输入双端输出、双端输入双端输出及____输入单端输出
【单选题】To some people lucid dreaming doesn't happen automatically and they need special training to learn to dream lucidly.