【单选题】You can easily _______ this question if you study British history.
【单选题】磷化锌中毒的病人在饮食上需很注意,牛奶、鸡蛋及其他油类食物都不能食用,这是因为
【简答题】You can easily drag a window to change its size and location with the mouse.
【单选题】These are _questions. You can answer them . [ ]