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【单选题】
以下哪种不是单结晶体管的常见型号。A.
BT31
B.
BT33
C.
BT35
D.
3DG68
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【单选题】钢筋宜采用无延伸功能的机械设备进行调直，也可采用冷拉方法调直。当采用冷拉方法调直时，HPB235、HPB300光圆钢筋的冷拉率不宜大于（）
A.
1%
B.
2%
C.
3%
D.
4%
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A.
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B.
2%
C.
3%
D.
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【单选题】The computer is a useful machine. It is the most important invention in many years. T he oldest kind of computer is the abacus( 算盘 ), used in China centuries ago, but the first large, modern computer ...
A.
helpful
B.
strange
C.
large
D.
dangerous
【简答题】钢筋宜采用无延伸功能的机械设备进行调直，也可采用冷拉方法调直。当采用冷拉方法调直时，HPB235、HPB300光圆钢筋的冷拉率不宜大于（）；HRB335、HRB400、HRB500、HRBF335、HRBF400、HRBF500及RRB400 带肋钢筋的冷拉率不宜大于（）。钢筋调直过程中不应损伤带肋钢筋的横肋。调直后的钢筋应平直，不应有局部弯折。
【简答题】钢筋宜采用无延伸功能的机械设备进行调直，也可采用冷拉调直。当采用冷拉调直时，HPB300 光圆钢筋的冷拉率不宜大于（）%。
【简答题】在大学校园里
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