题干

岸边楼房上的红旗和河里小船上的小旗都向西飘,请你详细分析:小船相对于岸边楼房的运动状态有哪些情况?

上一题 下一题 0.0难度 选择题 更新时间:2015-11-18 04:16:24

答案(点此获取答案解析)

解:小船上的红旗的方向和岸上房子红旗的方向相同,所以小船相对于岸上楼房的运动状态可能和楼房相对静止;

由岸上房子红旗的方向可知:风向是由东向西,所以小船也可能是逆风行驶,即向东运动;

也可能是顺风行驶,即向西运动,但是船速小于风速.

故船相对于岸上的楼房的运动状态有三种可能:

(1)静止;

(2)向东运动;

(3)向西运动,但此时船航行的速度小于风速.

同类题2

完形填空

    A poor farmer had a friend who was famous for the wonderful apples he grew. One day, his friend gave him a young apple tree and told him to take it home and 1 it.

    Seeing the gift, the farmer was very happy, and he thought he would also have a lot of wonderful apples, but when he got home, he felt 2 . He did not know where to plant it. He thought over and over and considered every place he could think of. 3 , he decided to plant the tree in his woods. There were many high trees with thick leaves in the woods. With those trees around ,no one else could see the young apple tree. He even felt proud of himself for finding so secret a place for the apple tree. Every day he went to take care of the tree, watering it. To his surprise and 4, the apple tree didn't grow as well as he expected.  It died without sunlight and good soil.

    Later the friend asked the farmer why he had planted the tree in such a 5place. "What's the difference?" the farmer said angrily. "If I had planted the tree near the6, passers-by(行人) would have stolen the fruit. If I had planted the tree in one of my fields, my neighbors would have come at night and 7 some of the apples! If I had planted it near my house, my own children would have taken the fruits. No matter where I plant the tree, I can't have8 to enjoy the apples: So there is no difference where I planted it."

    "Yes," said the friend. "But sooner or later someone could have enjoyed the fruit. Now you not only have robbed(抢夺) everyone of the fruit, but also have 9 a good apple tree! You don't know the true meaning of 'share'!"

    We should learn to 10in our life. The more you want to own something all by yourself, the less you get at last.