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【单选题】
为避免铸造时产生缩孔或裂纹,铸件的壁厚应该( )。
A.
没有要求
B.
不需要过渡
C.
必须一样厚
D.
大致相等,或缓慢过渡
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参考答案:
举一反三
【单选题】平面与球相交,其截交线的空间形状是( )
A.
只能为圆
B.
只能为椭圆
C.
可能为直线
D.
可能为抛物线
【单选题】Read the section "Biggest Business Run By Girls In The World." Which sentence from the section shows how Megan Ferland feels about the Girl Scouts?
A.
Megan Ferland is a Girl Scout official.
B.
She is the head of the group in Western Washington.
C.
They think the girls just sell cookies.
D.
Ferland says it is the biggest business run by girls in the world.
【判断题】The western section of the Bay Bridge is double suspension bridge
A.
正确
B.
错误
【简答题】Identifying Main Points Each of the ten statements below contains information given in one of the sections in the text. Each section is marked with a letter. Identify the section from which the inform...
【判断题】Different with the western section, the eastern section of Bay Bridge is a cantilever bridge.
A.
正确
B.
错误
【简答题】专利检索基本步骤是什么?
【单选题】已知某电解质溶液中离子的迁移速率u+=5u-,则在阳极区内某一假想界面上所通过的电量为
A.
正离子迁移的电量
B.
负离子迁移的电量
C.
正负离子迁移电量之和
D.
正负离子迁移电量之差
【多选题】有关绵马贯众,正确的说法是
A.
来源于鳞毛蕨科
B.
主产于黑龙江、吉林、辽宁三省
C.
根茎上密被排列整齐的叶柄残基及鳞片
D.
分体中柱5—13个
E.
原植物为粗茎鳞毛蕨
【判断题】The western section of the Bay Bridge is a single suspension bridge.
A.
正确
B.
错误
【简答题】Each of the ten statements below contains information given in one of the sections in the text. Each section is marked with a letter. Identify the section from which the information is derived. More t...
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