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【多选题】
按数控机床的伺服系统分类,数控机床可以分为 。A.
开环数控系统
B.
闭环数控系统
C.
半闭环数控系统
D.
轮廓控制的数控系统
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【简答题】句子翻译。 1. 信不信由你，我们学校没有这样一个人。 __________, there is __________ in our school. 2. 昨天在街上遛狗的时候，我碰巧遇到我的一个老同学。 While __________ in the street yesterday, I __________ to meet an old classmate of mine. 3. 如今说英语...
【单选题】(Para. 2, Text) “I think I got serious about this only recently when I ran into one of my former students, fresh from an excursion to Europe.” 句型提炼:A got serious / curious about B only recently when A...
C.
= “an old classmate”
D.
= “the hospital”
【单选题】关于生长因子,说法错误的是( )。
A.
生长因子必需,但不能自身合成的有机物
B.
狭义的生长因子一般指维生素
C.
广义的生长因子也包括碱基、嘌呤、嘧啶、生物素、烟酸等
D.
多数细菌存在生长因子问题
【简答题】Do you know David? He is an American boy. He’s eleven. He is in Class Two, Grade One. He has a sister. Her name is Joy. She is five. They have a dog(狗). Its name is Dongdong. How old is it? I know it’...
【简答题】Exercise s Fill in each blank with the proper forms of the word or words given in the brackets 1 I am sorry I can't have dinner with you because I_ _____ (go)a movie tonight with some friends. 2.After...
【简答题】用所给词的正确形式填空 （10分） 小题1:He went out without _______________(say) a word. 小题2:----Where ____________(be) you an hour ago? ----I ________(be) in Mrs Green’s office. 小题3:They _____________(go) to visit a f...
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