题目

元素“氦、铷、铯”等是用下列哪种科学方法发现的( ) A．红外光谱    B．质谱     C．原子光谱    D．核磁共振谱 答案：C根据括号内的英(汉)语提示，完成句子。 1.Nothing can prevent us from         (realize) our “Chinese Dream”.   2.Unfortunately he had his left leg      (break) in the high jump last week. 3.My grandmother often falls      (睡着) when she watches TV. 4.Tom      (write) his lessons when he heard a terrible noise outside. 5.Mary has curly hair and she is of medium      (高度). 6.Lucy often      (刷) her teeth after meals. 7.We have walked for a long time. Let’s stop      (have) some water. 8.—      you ever        (be) to an amusement park? —Yes, I have. 9.— What kind of noodles would you like ? — I’d like some        (牛肉) and tomato noodles, please.