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【简答题】
【Cloze】请往空格内填入对应单词短语的【字母】【字母】 【字母】 Complete the passage with words chosen from the following words. (A. mechanical B. numerous C. stumbled into D. imply E. hybrid F. cultural G. flexible H. premise I. panic J. when it comes to K. gritted her teeth L. not know the first thing about M. at a disadvantage) Isn’t it strange how chance can play such a large part in what we become? If Carolyn hadn’t (1)____________ that engineering course, she would never have become an engineer. At the time she did (2)__________ anything (3)_________. But (4)____________ hard work, she is no stacker. She threw herself into study and joined in the project to make a (5)___________ vehicle. She admits that she often found studying math difficult, but she (6)________________ and got on with it, working on the (7)_________ that math is a hard subject for most people. Girls, she argues, are no more (8)__________ in this respect than boys. Nonetheless, she still had moments of (9)_____________ when she found making progress particularly difficult. Carolyn concludes that we should not allow (10)__________ expectations to limit our horizons, for we are far more (11)__________ in what we can achieve than they would (12)_____________.
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【简答题】某低温热水地面辐射供暖系统,系统工作压力为0.4MPa,采用PE-X管,管子的公称外径为20mm,根据规范,管子的壁厚应为多少?
【多选题】铅垂面的投影特性是( )。
A.
正面投影具有收缩性
B.
水平面投影具有积聚性
C.
侧面投影具有收缩性
D.
三面投影都具有收缩性
【单选题】抱球、捧球、单手托球、正面双手垫球中,击球范围最大的是()。
A.
抱球
B.
捧球
C.
单手托球
D.
正面双手垫球
【单选题】Mooring winches are often combined with _____ units so that one prime mover drives both.
A.
crane
B.
hatch cover
C.
windlass
D.
steering gear
【多选题】铅垂面的投影特性是:( )。
A.
正面投影具有类似性
B.
水平面投影具有积聚性
C.
侧面投影具有收缩性
D.
三面投影都具有类似性
【判断题】行星齿轮式差速器的半轴齿轮的背面为平面。
A.
正确
B.
错误
【单选题】抱球、捧球、单手托球、正面双手垫球中,击球范围最大的是()
A.
捧球
B.
单手托球
C.
抱球
D.
正面双手垫球
【多选题】铅垂面有哪些投影特性?
A.
水平投影积聚为线
B.
侧面投影积聚为线
C.
正面投影积聚为线
D.
水平投影与OX轴的夹角反应平面与正面投影面的夹角。
【判断题】12行星齿轮式差速器的半轴齿轮的背面为平面
A.
正确
B.
错误
【判断题】551行星齿轮式差速器的半轴齿轮的背面为平面。
A.
正确
B.
错误
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