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【单选题】
Determine the upper limit of Ra for the surface 1. (Single option: 10 points)
A.
6.3μm
B.
25μm
C.
12.5μm
D.
None
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参考答案：
举一反三
【单选题】耐热铸铁大多为（）基体的球墨铸铁。
A.
单相珠光体
B.
单相铁素体
C.
珠光体＋铁素体
D.
可锻铸铁
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【判断题】计算钢筋混凝土梁斜截面抗剪承载力时，规范规定的上限值相当于限值了梁的最小尺寸和最大配窟率。
A.
正确
B.
错误
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【判断题】钢筋混凝土梁斜截面抗剪承载力计算时,梁的汁算剪力包络图是计算得到的各截面最大剪力组合设计值V d 乘上结构重要性系数γ 0 。后所形成的计算剪力图。
A.
正确
B.
错误
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【单选题】Concentrating on her writing, Mary was not ______ of what had happened around the house.
A.
sensitive
B.
aware of
C.
thoughtful
D.
conscious
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【简答题】原核生物与真核生物mRNA有何特点？
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【简答题】Tracy Wong is a wellknown ChineseAmerican writer.But her writing ____ was something she picked up by herself.After her first ____， teaching disabled children, she became a parttime writer for IBM._...
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【简答题】原核生物与真核生物mRNA有何特点?
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【简答题】Tracy Wong is a well-known Chinese-American writer. But her writing 41 was something she picked up by herself. After her first 42 , teaching disabled children, she became a part-time writer for IBM. 4...
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【判断题】双曲柄机构中,通常主动曲柄作匀速运动,从动曲柄做同向匀速转动。
A.
正确
B.
错误
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【单选题】配有腹筋的钢筋混凝土梁斜截面抗剪承载力计算时,若计算公式 的上限值不满足,则应( )。
A.
加大截面尺寸或提高混凝土强度等级
B.
减小截面尺寸或提高混凝土强度等级
C.
加大截面尺寸或降低混凝土强度等级
D.
减小截面尺寸或降低混凝土强度等级
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【单选题】耐热铸铁大多为（）基体的球墨铸铁。
A.
单相珠光体
B.
单相铁素体
C.
珠光体＋铁素体
D.
可锻铸铁
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【判断题】计算钢筋混凝土梁斜截面抗剪承载力时，规范规定的上限值相当于限值了梁的最小尺寸和最大配窟率。
A.
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B.
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【判断题】钢筋混凝土梁斜截面抗剪承载力计算时,梁的汁算剪力包络图是计算得到的各截面最大剪力组合设计值V d 乘上结构重要性系数γ 0 。后所形成的计算剪力图。
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B.
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【单选题】Concentrating on her writing, Mary was not ______ of what had happened around the house.
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B.
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D.
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【简答题】原核生物与真核生物mRNA有何特点？
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【简答题】Tracy Wong is a wellknown ChineseAmerican writer.But her writing ____ was something she picked up by herself.After her first ____， teaching disabled children, she became a parttime writer for IBM._...
查看完整题目与答案
【简答题】原核生物与真核生物mRNA有何特点?
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【简答题】Tracy Wong is a well-known Chinese-American writer. But her writing 41 was something she picked up by herself. After her first 42 , teaching disabled children, she became a part-time writer for IBM. 4...
查看完整题目与答案
【判断题】双曲柄机构中,通常主动曲柄作匀速运动,从动曲柄做同向匀速转动。
A.
正确
B.
错误
查看完整题目与答案
【单选题】配有腹筋的钢筋混凝土梁斜截面抗剪承载力计算时,若计算公式 的上限值不满足,则应( )。
A.
加大截面尺寸或提高混凝土强度等级
B.
减小截面尺寸或提高混凝土强度等级
C.
加大截面尺寸或降低混凝土强度等级
D.
减小截面尺寸或降低混凝土强度等级
查看完整题目与答案
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