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Traffic information 填空-3We almost had a 1 with another aircraft.We almost had a mid-air collision with another aircraft.

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Traffic information 填空-4We have a possible 1 at 10 o’clock, 2 with our 3 .

Traffic information 填空-5We nearly collided with that aircraft. We had very little vertical separation. Do you know the flight number of that aircraft?我们差点与那架飞机相撞,我们几乎没有垂直间隔,你知道那架飞机的航班号吗?We nearly 1 that aircraft. We had very little 2 . Do you know the flight number of that aircraft?我们差点与那架飞机相撞,我们几乎没有垂直间隔,你知道那架飞机的航班号吗?

普通钢材在()°C左右会出现蓝脆现象,当温度达到()°C时,强度就几乎为零,丧失了承载力。

A. 150;300
B. 250;400
C. 250;600

钢材的性能因温度而变化,随着温度的降低,钢材的强度提高,而塑性和韧性降低,逐渐变脆,称为钢材的低温冷脆,特别是钢材的()对温度降低十分敏感。

A. 强度
B. 韧性
C. 塑性
D. 冷弯性能

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