【简答题】如图,要测量河两岸相对的两点 , 的距离,可以在 的垂线 上取两点 ,使 ,再定出 的垂线 ,使 在一条直线上,这时测得的 的长就是 的长,为什么?
【简答题】阅读下面的材料,然后根据材料内容回答所提问题。 Once upon a time, there was an island. All the feelings lived there such as Happiness, Sadness, and Love. One day the feelings heard that the island would sink (下沉). They all r...
【简答题】已知等差数列的通项为 ,则第5项与第6项之和为 .
【单选题】体育课上,老师测量某同学的跳远成绩的依据是 ( )
A.
经过直线外一点,有且只有一条直线与这条直线平行
【简答题】等级导线测量中,如果有N个未知点,这需要观测()个水平角和( )条边长
【单选题】In different situations, the question “Why don’t you close the door?” has different meanings. When a husband always leaves the bathroom door open after he uses it, his wife is saying the sentence to h...
【单选题】按照时间范围划分幼儿园具体教育目标,属于第四层次的是()
【简答题】阅读下面的材料,然后根据材料内容回答所提问题。 Paris is the capital of France. Its subway (地铁) is also very special. You can enjoy its culture when you are in this city. First you can see many people reading books in the su...
【单选题】The question is why all the technologic gadgetry has failed make a dent in the amount of business travel?
A.
a hollow area in a surface