皮皮学，免费搜题
登录
搜题
【单选题】
以下不属于坚固牙齿的方法的是( )。A.
多喝水。
B.
经常晒太阳。
C.
经常吃含钙丰富的食物。
D.
补充充足维生素D。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】A small town in southwest Britain is banning(禁止) plastic bags in an attempt to help the environment and cut waste—a step that environmentalists believe is a first for Europe. Shopkeepers in Modbury po...
【简答题】阅读理解 A small town in southwest Britain is banning (禁止) plastic bags in an attempt to help the environment and cut waste－a step that environmentalists believe is a first for Europe. Shopkeepers in Modb...
【简答题】They argue that plastic bottles make up a small portion of the nation ’s total waste.
【单选题】The small tax on plastic grocery bags in Ireland is mentioned to show that
A.
Ireland is determined to eliminate plastic pollution.
B.
incentive policies by the government are more effective.
C.
incentives can harness egoism and inspire altruism.
D.
monetary punishments usually have moral implications.
【单选题】刚体绕固定轴转动时,下列哪个说法是 正确的:
A.
刚体上 各 质元 （不在转轴）的角速度和角加速度的大小都是相同的
B.
刚体上 各 质元 （不在转轴）的法向加速度和切向加速度的大小都是相同的
C.
刚体上 各 质元 （不在转轴）的速度和加速度的大小都是相同的
D.
刚体上 各 质元 （不在转轴）的线位移和角位移都是相同的
【简答题】A small town in southwest Britain is banning (禁止) plastic bags in an attempt to help the environment and cut waste－a step that environmentalists believe is a first for Europe. Shopkeepers in Modbury p...
相关题目：