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【单选题】
E-R图中的主要元素是( )、联系和属性。A.
记录
B.
结点
C.
实体
D.
有向边
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举一反三
【简答题】According to Mr. Heath and Mr. Potter, consumerism can be traced back to [A] the imposition of overbearing companies. [B] the very nature of arms race. [C] the ignorance of some stupid workers. [D] th...
【单选题】关于上颈椎(枕-寰-枢复合体)的描述，不正确的是( )
A.
枕-寰-枢复合体是人体中轴骨中最复杂的关节
B.
枕-颈1和颈1～2的关节均有伸屈运动
C.
颈1～2关节有旋转运动
D.
枕-颈1关节旋转范围较大
E.
枕-颈1关节没有旋转功能
【单选题】According to the text the writer often talks in class about______.
A.
the arrangement of school parties
B.
the future of students'job choices
C.
the organization of school sports
D.
the planning of family vacations
【简答题】According to Mr. Bjomson, __________.
【简答题】According to Mr. Axelrod of Home Depot, people are trying to ride by ________________.
【单选题】When can Mr. Carson ring Mr. Prince according to the woman?
A.
He'll ring Mr. Prince as soon as he returns from lunch.
B.
He'll ring Mr. Prince as soon as he returns before lunch.
C.
He'll ring Mr. Prince as soon as he goes away from lunch.
【单选题】能满足定角速比传动条件的一对齿廓，称为共轭齿廓。能作为共轭齿廓曲线的有（ ）
A.
只有渐开线
B.
只有圆弧线
C.
只有摆线
D.
只要给出一条曲线，总能找到一条与之共轭的曲线
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