题干

如图,0M⊥NP,ON⊥NP,所以ON与OM重合,理由是(  )

A:两点确定一条直线

B:经过一点有且只有一条直线与已知直线垂直

C:过一点只能作一直线

D:垂线段最短

上一题 下一题 0.0难度 选择题 更新时间:2015-12-24 04:28:48

答案(点此获取答案解析)

B

同类题3

完形填空,根据短文内容,从各题所给的A、B、C、D四个选项中选出最佳选项。

    Kevin sat at the desk in his study, pencil in hand. He had to write a story for his English class by Friday. “I don't know what to1,” he complained to his dog, who was asleep at his feet. Kevin was talkative when speaking to his friends, yet he had2finding words he had to write.

    By bedtime Kevin had drawn a picture of his dog smiling. He had drawn a tree with its branches(树枝) blowing in a high wind. He had also written a3asking his friend to go to the movies on Saturday.4he had not written a single word of his story.

    On Wednesday, Mrs Scott, Kevin's English teacher, asked the class to5the first draft() of their stories. Kevin had to turn in the only work that he had—the page with his name, the6, and the note.

    Kevin wasn't7when Mrs Scott asked him to stay after class the next day. But he was surprised by what8said to him. “Kevin, this is a fantastic story—the dog, the movie, the tree in the9. I can't wait to find out how they all fit together. I think you have the idea of a story there. Look at your note and the pictures and try to see10a story comes to you.”

    That night Kevin sat at his desk, and this was what he wrote: “One Saturday Tom went to meet his friend at the11. It looked as if it might rain, so Tom12his umbrella. Suddenly a big storm blew in. The noise of the wind13like Tom's dog Spotty. Spotty really hated storms and barked whenever he wanted to be let inside. Then Tom saw Spotty running after him down the busy street, barking. The sound was full of blame(责备). Tom felt14because he had left Spotty outside. He turned and headed home with Spotty. Tom let Spotty in the door just and the rain started to pour down.”

    Kevin had a story after all. The last thing he did was to write his name15at the top of the page.

同类题4

阅读下文,回答相关问题。

                                                                                                                                 最后一课
        语法课完了,我们又上习字课。那一天,韩麦尔先生发给我们新的字帖,帖上都是美丽的圆体字:“法兰西”“阿尔萨斯”“法兰西”“阿尔萨斯”。这些字帖挂在我们课桌的铁杆上,就好像许多面小国旗在教室里飘扬。个个都那么专心,教室里那么安静!只听见钢笔在纸上沙沙地响。有时候一些金甲虫飞进来,但是谁都不注意,连最小的孩子也不分心,他们正在专心画“杠子”,好像那也算是法国字。屋顶上鸽子咕咕咕咕地低声叫着,我心里想:“他们该不会强迫这些鸽子也用德国话唱歌吧!”
        ……
        忽然教堂的钟敲了十二下。祈祷的钟声也响了。窗外又传来普鲁士兵的号声——他们已经收操了。韩麦尔先生站起来,脸色惨白,我觉得他从来没有这么高大。
        “我的朋友们啊,”他说,“我——我——”
        但是他哽住了,他说不下去了。
        他转身朝着黑板,拿起一支粉笔,使出全身的力量,写了两个大字:
        “法兰西万岁!”
        然后他呆在那儿,头靠着墙壁,话也不说,只向我们做了一个手势:“散学了,——你们走吧。”