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【单选题】
根管预备的注意事项中,哪一条是不正确的A.
首先测定工作长度
B.
器械只到达根尖狭窄部
C.
用根管钻或锉时，进行
D.
每换一支器械前，行根管冲洗
E.
根尽量扩大为好
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举一反三
【简答题】小诗人:选择你喜欢的季节,用上下面的句式,说一说或写一写。 ,它对 说:“我是 。” ,它 说:“我是 。”
【简答题】从2019年1月1日起,实施三年百万青年见习计划;将就业见习补贴范围由离校未就业高校毕业生扩展至____失业青年。
【多选题】多选2 Hooray! It's snowing! It's time to make a snowman.James runs out. He makes a big pile of snow. He puts a big snowball on top. He adds a scarf and a hat. He adds an orange for the nose. He adds coa...
A.
1.Hooray! It's snowing! It's time to make a snowman.James runs out. He makes a big pile of snow. He puts a big snowball on top. He adds a scarf and a hat. He adds an orange for the nose. He adds coal for the eyes and buttons.In the evening, James opens the door. What does he see? The snowman is moving! James invites him in. The snowman has never been inside a house. He says hello to the cat. He plays with paper towels.A moment later, the snowman takes James's hand and goes out.They go up, up, up into the air! They are flying! What a wonderful night!The next morning, James jumps out of bed. He runs to the door.He wants to thank the snowman. But he's gone
B.
2
C.
3
D.
4
【单选题】设有向无环图G中的有向边集合E={,,,},则下列属于该有向图G的一种拓扑排序序列的是()。
A.
1,2,3,4
B.
2,3,4,1
C.
1,4,2,3
D.
1,2,4,3
【单选题】下面关于施工测量放线的基本准则的叙述,错误的是( )。
A.
学习、执行国家法令、规范，为施工测量服务，对施工质量与进度负责
B.
先测设精度较高的场地整体控制网，再以控制网为依据进行各局部建筑物的定线、放线
C.
应坚持测量作业与计算工作步步校核
D.
应选择科学、简单的测量方法，采用精度较高的仪器，力求做到高精度测量
【判断题】设【图片】、【图片】和【图片】分别为向量【图片】关于【图片】轴、【图片】轴和【图片】轴的方向角，则向量【图片】的方向角为【图片】、【图片】和【图片】.
A.
正确
B.
错误
【单选题】设有向无环图G中的有向边集合E={,,,},则下列属于该有向图G的一种拓扑排序序列的是()
A.
1,2,3,4
B.
2,3,4,1
C.
1,4,2,3
D.
1,2,4,3
【单选题】He ________ in a small workshop, but now he is the boss of a big company.
A.
used to work
B.
was used to work
C.
used to working
D.
was used to working
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