社会主义思想道德建设的核心是（    ）

如图甲图中①②两城市地处中纬度沿海地区，乙图是①②两城市的气温曲线和将水柱状图，读图完成小题。

阅读理解。   

     My name is Xiaoming. I get up at half past six. I have breakfast at seven o'clock. I go to school at eight o'clock. I have lunch at twelve o'clock. I go home at four o'clock. I have dinner at five o'clock. I watch TV at half past six. I do my homework at seven o;clock. I go to bed at nine o'clock.

在水平地面上固定一个竖直轻弹簧，现在弹簧上端放一个重为10N的木块后，弹簧被压缩了2cm，系统处于平衡状态，则轻弹簧的劲度系数为（　　）

I tried many ways I could think of____ (stop) the little boy from crying.