题干

(2011年杭州学军中学检测)北京时间2010年8月1日5时30分,中国在西昌卫星发射中心用“长征三号甲”运载火箭,将第五颗北斗导航卫星成功送入太空预定轨道.这标志着卫星导航市场的垄断局面被打破,北斗卫星导航系统将免费提供定位、测速和授时服务,定位精度10 m,测速精度0.2 m/s,以下说法不正确的是(  )

A:北斗导航卫星定位提供的是被测物体的位移

B:北斗导航卫星定位提供的是被测物体的位置

C:北斗导航卫星授时服务提供的是时刻

D:北斗导航卫星测速服务提供的是运动物体的速率

上一题 下一题 0.0难度 选择题 更新时间:2018-07-02 10:31:17

答案(点此获取答案解析)

A

同类题3

根据短文内容和首字母提示,在下文空格处填入适当的词使短文完整。在标有题号的横线上,完整写出空缺处所填单词的正确形式。(每空一词)

    He met her at a party. She was excellent. After the party, he invited her for coffee. She was surprised. So as not to appear rude, she went along.

    As they sat in a nice coffee shop, he was t____ nervous to say anything and she felt uncomfortable. Suddenly, he asked the waiter, "Could you please give me some salt? I'd like to put it in my coffee."

    They looked at him for a long time. He turned red, but when the salt came, he put it in his coffee and drank. Curious, she asked, "Why puts____ in the coffee?" He explained, "When I was a little boy, I lived near the sea. I liked playing on the seaside. I could feel its taste salty, like salty coffee. Now every time I drink it, I think of my childhood and my hometown. I miss it and my parents." She was d____ touched. A man who can admit(承认) that he's homesick must love his home and care about his family. He must be responsible. That was the start of their l____ story. They chose to date(约会). She found that he met all her requirements(要求). So they married and lived h____ together. And every time she made coffee for him, she put in some salt, the w____ he liked it.

    After 40 years, he d ____and left her a letter which said: “My dearest, please forgive(原谅)my life-long lie. Remember the first time we dated? I was so nervous I asked for salt instead of sugar. It was hard for me to ask for a change, so I just went ahead. Many times, I tried to tell you the t____, but I was afraid that it would ruin(毁灭) everything. Sweetheart, I don't exactly like salty coffee. But as it mattered so much to you, I've learnt to enjoy it. Having you with me was my greatest happiness. If I could live a s____ time, I hope we can be together again, even if it means that I have to drink salty coffee for the r____ of my life.