练习册

  • 练习册
  • 试题
    B.他先在餐厅挂上画. 【查看更多】

     

    题目列表(包括答案和解析)

    （本题满分14分）如图，α⊥β，α∩β=l， A∈α， B∈β，点A在直线l上的射影为A1， 点B在l的射影为B1，已知AB=2，AA1=1， BB1=， 求:
    (Ⅰ) 直线AB分别与平面α，β所成角的大小;
    (Ⅱ)二面角A1－AB－B1的余弦值．

    查看答案和解析>>

    根据汉语意思，完成下列句子。
    1. 你不介意我听音乐吧?
        Would you ______ my ________ _______ to the music?
    2. 车站很远,你最好坐公共汽车.
        The station is quite far. You'd _____ _____ a bus.
    3. 好多同学都积极参加上周的运动会.
        Many student ______ ______ ______ _______ ______ the sports meeting last week.
    4. Betty长大后想当一名歌手.
       Betty want to _____ a singer when she ________ _______.
    5. 他总是在公共汽车上把座位让给需要帮助的人.
        He always gives seats to people ______ ______ on the bus.

    查看答案和解析>>

    Jim一家人都非常喜欢帮助别人，他要在下次班会上介绍他们一家人参加志愿工作的情况，请帮他完成说话稿。
    All of my family volunteer to help other people in our spare time on _小题1:_(周末). My brother is a senior high school student. Every Sunday morning, he make some _小题2:__(护士), on Saturdays, she usually goes to a special school to look after the _小题3:_(盲的) and the 小题4: (聋的). She likes them very much. As for me, I wish to be a good engineer in the future. So I often 小题5:__(修理) some _小题6:___(破损的) machines for my 小题7:__(邻居).
    People often say because of our _小题8:___( 善良 ) ,my family bring them much pleasure.
    Can you _小题9:__ (想象) how happy we are?

    查看答案和解析>>

    他总是在公共汽车上把座位让给需要帮助的人。

    He always gives seats to people ______ ______ on the bus.

    查看答案和解析>>

    短文改错

    请对下面所给短文的每一行作出判断，如该行多一个词，把多余的词用斜线(\)划掉，在该行右边横线上写出该词，并也用斜线划掉；如该行缺一个词，在空缺处加一个漏词符号(∧)，在该行右边横线上写出该加的词；如该行错一个词，在错的词下划一横线，在该行右边横线上写出改正后的词；如该行没有错，就不要改，在右边横线上画一个勾(√)。每行只有一个错误。

    Boys and girls! It's time put away your homework,
    1．_______
    find your swimming suit and put on your sunglass,
    2．_______
    because of school is out for summer! Ice cream(冰淇淋),
    3．_______
    long bike rides, playing computer games, reading good
    4．_______
    books, go to parks－the summer can be a season of
    5．_______
    fun. But it can be full of dangers. You needs
    6．_______
    to stay safe and healthy during you summer holiday. Keep
    7．_______
    away from any danger when you went out. Keep your
    8．_______
    smiling and have good time this summer season! After
    9．_______
    all, you want to have a good story to say your teachers
    10．_______

    next term when you are back at school again.

    查看答案和解析>>


    同步练习册答案