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【单选题】
麻花钻宜用 ( ▲ ) 砂轮磨削。A.
棕刚玉
B.
白刚玉
C.
黑碳化硅
D.
绿碳化硅
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反馈参考答案：
举一反三
【单选题】某旅游团赴成都旅游,因为是旅游旺季,几位游客的住房由标准间降为三人间,引起几人的不满,地陪应该
A.
给这几个游客更换酒店
B.
和饭店协商调换房间，但客人需承担房费差价
C.
负责调换，确有困难时，应说明原因并提出补偿条件
D.
请领队在团内调整
【单选题】According to the theory of dark adaptation, before and during night flight, the pilot should
A.
Avoid the irradiation of strong light and enter the cockpit 30 minutes earlier.
B.
Enter the cockpit 5 minutes earlier and set the instrument lights to their maximum.
C.
Enter the cockpit 15 minutes earlier and set the instrument lights to their minimum
【单选题】The pilot in command of an aircraft is the person _______ the aircraft who is responsible for its operation and safety during flight.
A.
board
B.
aboard
C.
broad
D.
abroad
【单选题】The pilot in command of an aircraft is the person ______the aircraft who is ultimately responsible for its operation and safety during flight.
A.
board
B.
aboard
C.
broad
D.
abroad
【单选题】词汇与结构 The Pilot in Command (PIC) of an aircraft is the person aboard the aircraft who is ultimately responsible for its ____ and safety during flight.
A.
operation
B.
working
C.
maneuvering
D.
executing
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