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【单选题】
在下面所列出的工艺结构中，没有在下图所表达的零件中出现的是？【图片】A.
肋板
B.
倒角
C.
退刀槽
D.
铸造圆角
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【简答题】I am James Penguin. Jane Penguin is my wife. Our home is as cold as an icebox, but we love it. Our land is very large. We see only sonw and ice all around .But our land is not all white . There are br...
【简答题】 Why most of us avoid listening to classical music is because, most of the time we listen to music, while performing some physical activities, such as dancing, walking, jogging and working out in the...
【单选题】According to the author, most of the time we don't know __________.
A.
what happiness is
B.
how to take care of kids
C.
what brings happiness to us
D.
how to give our kids lasting happiness
【简答题】For any Englishman , there can never be any discussion as to who is the world’s greatest dramatist( 剧作家 ) . Only one name can possibly suggest itself to him : that of William Shakespeare Every English...
【简答题】Most of the time we ______ DHL for deliveries. This time, we _______ a different company.(use)
【单选题】龋病的形成与下列哪些因素有关
A.
变形链球菌是主要的致病菌
B.
血链球菌与唾液链球菌也与龋病有关
C.
根面龋与粘性放线菌有关
D.
牙菌斑中的细菌代谢蔗糖产生酸性产物
E.
以上全部都是
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