皮皮学,免费搜题
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搜题
【单选题】
下列选项中含有不属于绘制规则图形的绘图工具的是
A.
钢笔工具、多边形工具、3点曲线工具
B.
椭圆工具、多边形工具、螺旋形工具
C.
螺旋形工具、矩形工具、椭圆工具
D.
椭圆工具、基本形状工具、多边形工具
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皮皮学刷刷变学霸
举一反三
【单选题】蜗杆直径系数的标准化是为了
A.
保证蜗杆有足够的刚度
B.
减少加工时蜗轮滚刀的数目
C.
提高蜗杆传动的效率
D.
减小蜗杆的直径
【单选题】He has always regretted _____ the opportunity at college. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
not to have taken
B.
not having taken prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
C.
not to take
D.
not take
【单选题】粗加工时,切削液以 ( ) 为主。
A.
煤油
B.
切削油
C.
乳化液
D.
润滑油
【多选题】行车值班员的主要工作内容包括(   )
A.
拆卸票箱
B.
监控各项设备设施状态
C.
C施工作业登记
D.
D车站行车组织工作
【简答题】He has two big round Chinese __________ (wood) tables.
【单选题】粗加工时,切削液以( )为主。
A.
乳化液
B.
煤油
C.
柴油
D.
切削油
【单选题】Mr. Brown is 102 years old. He is leading a full and active life. Why has he【21】so long? Many【22】would like to know the answer to the question. They are studying groups of old people all over the worl...
A.
been
B.
worked
C.
stayed
D.
lived
【简答题】听录音,选择正确的答句。 (     ) 1. A. I wear size 16. (     ) 2. A. He has a fever. (     ) 3. A. She is a TV reporter. (     ) 4. A. I went fishing. (     ) 5. A. This weekend. (     ) 6. A. It's windy and cold...
【简答题】Billy is four years old and in the ninth grade. He has a 26 job which gets him 27 at five o’clock every morning. He is a 28 . Each morning, Billy leaves the house at 5: l5 to go to the corner 29 t...
【简答题】Sam goes home from school. He’s hungry(饿的).And he has a lot of homework. He wants to see Mike and 26 football, too. He doesn’t have 27 time. “Hello,Sam,”says Mrs Green.“ 28 is school today? ” “Fine. B...
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