大气温度周期性变化有:
A. 日变化
B. 周变化
C. 月变化
D. 年变化
E. 季变化
系统应当自动生成温湿度监测记录,内容包括:
A. 温度值
B. 湿度值
C. 日期
D. 时间
E. 测点位置
后背痒痒了怎么办?1700多年前,中国人雕了一只木头手臂。这个小东西有个生动的名字,叫“不求人”。What do you do if your back ____? The Chinese made a ____ arm to solve this problem some 1700 years ago. It had a lovely name, “accomplish on your own”.
后来不求人和大臣用来记事的笏板合为一体。它有一个好听的名字叫“如意”,意思是符合心意,是一种权力的象征。Later it _____ a jade plank which was used by high officials to make notes when they met the emperor. The new one, named ru yi, which mean “everything goes well” in Chinese, ____ power.