题目内容

Generally speaking，in the Northern Hemisphere，when winds are blowing from between SE and SW the barometric reading（）.

A. makes no change at all
B. is somewhat lower than it would be for winds from a northern quadrant
C. is uncertain and may fluctuate by increasing and decreasing
D. is somewhat higher than it would be for winds from the northern quadrant

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直流电是由变压整流器1和变压整流器2（TR1和TR2）提供的，所有的变压整流器的最大输出为（）

A. 20028V直流；
B. 18028V直流；
C. 16028V直流

对于200mm×1250mm断面的铸坯，拉速1m/min，二冷水总水量为120t/h，求其比水量？（铸坯比重7.8t/m³）

麻绳具有轻便、容易捆绑、不易损伤等优点，但它适应用温度较低，吊装质量小于（）kg为宜。

A. 500
B. 550
C. 600
D. 650

由于曲线（）超高，车辆向曲线内侧倾斜，使车辆上部在水平方向上向内移动了一定距离d内2。