在一定时期内,如果企业的保本作业率为1,则可以断定该企业处于保本状态。
A. 对
B. 错
Lesson 7 短听力选择 1听一遍，选择正确答案
A. Two aircraft collided with each other.
B. The aircraft suffered from burst tyre.
C. There was a fuel leak on the starboard wing.
D. The left wing fuel tank punctured.
Lesson 7 短听力选择 2听一遍，选择正确答案
An aircraft mistakenly blocked his way.
B. ChinaSouthern1347 taxied to a wrong way.
C. Boeing747 encountered gear problem.
D. An unreported vehicle was on the Taxiway B
Lesson 7 短听力选择 3听一遍，选择正确答案
A. No.2 engine was overheating.
B. The temperature of brakes was over limitation.
C. Fire warning light illuminated.
D. They had a flat tyre on the nose gear.
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