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【单选题】
南宁至钦州段的高速铁路正在建设中。请回答下列问题： (1)铁路建设中大量使用了以下材料：①石子；②钢筋水泥柱；③钢轨等，其中钢轨属于 A 。
A.
金属材料
B.
合成材料
C.
有机天然材料
D.
无机非金属材料 (2)建设中，常用铝和氧化铁(Fe 2 O 3 )在高温条件下，反应生成熔融状态下的铁单质对钢轨中的缝隙进行焊接。反应的化学方程式为：Fe 2 O 3 +2Al 高温X+2Fe，则X的化学式为 Al 2 O 3 ，该反应的基本类型是 置换反应 。 (3)钢轨长时间使用后会生锈。铁锈的主要成分是Fe 2 O 3 ·xH 2 O；除铁锈常用的一种试剂是 。 (4)请写出防止铁制品锈蚀的两种常用方法：① ；②
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参考答案：
举一反三
【单选题】You are a little overweight. I suggest you ______ Rosie's example and start doing regular exercise.
A.
set
B.
copy
C.
follow
D.
give
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【单选题】What does the boy think is also important to young people?
A.
Doing regular checkups to prevent illness that threatens our longevity.
B.
Doing crossword puzzles.
C.
Doing everything in the list.
D.
Doing gardening every day.
查看完整题目与答案
【判断题】计算机的硬件资源和软件资源都是由操作系统管理的。( )
A.
正确
B.
错误
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【简答题】在串的运算中,EqualStr("aaa","aaa")的返回值为( ) 。
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【单选题】“班轮”的英文是( )。
A.
1ine ship transport
B.
1ine shipping
C.
1iner
D.
1iner transport
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【单选题】分时操作系统是指( )。
A.
多个用户分时使用同一台计算机的某个终端
B.
多道程序分时共享计算机的软硬件资源
C.
操作系统分时接收到每个用户的指令后进行批处理
D.
每个用户都有独立的计算机及终端，任务由分时操作系统提交给服务器
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【单选题】阅读材料，回答题。 What Is Globalization ? It was the anti-globalization movement that really put globalization on the map. As a word it has existed since the 1960s, but the protests against this allegedly new...
A.
Right
B.
Wrong
C.
Not mentioned
查看完整题目与答案
【单选题】According to the passage, what was the percentage of American adults doing regular physical exercises two years ago?
A.
About 70%.
B.
Nearly 60%.
C.
Almost 50%.
D.
More than 12%.
查看完整题目与答案
【多选题】Globalization has several facets, including _____________________.
A.
the globalization of markets
B.
the globalization of manufacturing
C.
the globalization of production
D.
the globalization of marketing
查看完整题目与答案
【简答题】A．Doing regular checkups to pr illness that threatens our longevity. B．Doing crosswords puzzles. C．Doing everything in the list. D．Doing gardening everyday.
查看完整题目与答案
相关题目：
【单选题】You are a little overweight. I suggest you ______ Rosie's example and start doing regular exercise.
A.
set
B.
copy
C.
follow
D.
give
查看完整题目与答案
【单选题】What does the boy think is also important to young people?
A.
Doing regular checkups to prevent illness that threatens our longevity.
B.
Doing crossword puzzles.
C.
Doing everything in the list.
D.
Doing gardening every day.
查看完整题目与答案
【判断题】计算机的硬件资源和软件资源都是由操作系统管理的。( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】在串的运算中,EqualStr("aaa","aaa")的返回值为( ) 。
查看完整题目与答案
【单选题】“班轮”的英文是( )。
A.
1ine ship transport
B.
1ine shipping
C.
1iner
D.
1iner transport
查看完整题目与答案
【单选题】分时操作系统是指( )。
A.
多个用户分时使用同一台计算机的某个终端
B.
多道程序分时共享计算机的软硬件资源
C.
操作系统分时接收到每个用户的指令后进行批处理
D.
每个用户都有独立的计算机及终端，任务由分时操作系统提交给服务器
查看完整题目与答案
【单选题】阅读材料，回答题。 What Is Globalization ? It was the anti-globalization movement that really put globalization on the map. As a word it has existed since the 1960s, but the protests against this allegedly new...
A.
Right
B.
Wrong
C.
Not mentioned
查看完整题目与答案
【单选题】According to the passage, what was the percentage of American adults doing regular physical exercises two years ago?
A.
About 70%.
B.
Nearly 60%.
C.
Almost 50%.
D.
More than 12%.
查看完整题目与答案
【多选题】Globalization has several facets, including _____________________.
A.
the globalization of markets
B.
the globalization of manufacturing
C.
the globalization of production
D.
the globalization of marketing
查看完整题目与答案
【简答题】A．Doing regular checkups to pr illness that threatens our longevity. B．Doing crosswords puzzles. C．Doing everything in the list. D．Doing gardening everyday.
查看完整题目与答案
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