皮皮学，免费搜题
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【多选题】
低合金结构钢是在普通钢中加入微量合金元素，但硫、磷杂质的含量保持普通钢自水平，具有较好的综合力学性能。主要适用于( )。A.
锅炉汽包
B.
压力容器、压力管道
C.
桥梁
D.
重轨和轻轨
E.
制造各种型钢
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皮皮学刷刷变学霸
举一反三
【简答题】时间继电器的新国标文字符号是?
【单选题】We hadn’t met for 20 years, but i recognized her _______ I saw her.
A.
the moment
B.
for the moment
C.
the moment when
D.
at the moment when
【简答题】Directions:Choose the most appropriate word to complete the passage. Today my English teacher chose my essay to read to the class. I had tried to make it funny ─ and it worked! Everybody laughed. Even...
【简答题】Directions:Choose the most appropriate word to complete the passage. Today my English teacher chose my essay to read to the class. I had tried to make itf unny ─ and it worked! Everybody laughed. Even...
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