A、 Write instructions in the infinite form.
B、 Write instructions in the command form.
C、 Write instructions in the appropriate form.
答案：B
A、 Write instructions in the infinite form.
B、 Write instructions in the command form.
C、 Write instructions in the appropriate form.
答案：B
A. State structure of airframe, wings and tail.
B. Present structure of airframe, wings and empennage.
C. Describe structure of fuselage, wings, and empennage.
A. 如果无线电信号不清晰，调整频率。
B. 如果电子信号不清楚，调整波长。
C. 如果广播信号不清楚，测试频率。
A. Make sure you press the switch when you hear the boarding music.
B. Make sure you press the switch after you hear the boarding music.
C. Make sure that you hear the boarding music after you push the button.
A. L1 entry door life vests were not installed by flight crew.
B. Life vests at L1 entry door flight crew station not install.
C. Life vests were not installed at L1 entry door flight crew station.
A. If the error is more than 3 degrees, calibrate the glide slope.
B. If the error is more than 3 degrees, calibrate the compass.
C. If the error is more than 3 degrees, calibrate the gyroscope.
A. 这部分系统被用来控制空气中的湿度，控制臭氧含量，从空调空气中去除放射性污染物，并对空气应用除氧剂、净化器等。
B. 系统的这个部分被用于控制空气中的颗粒，控制区域聚集度，过滤空调空气中活跃的无线电波，并在合适的时候对空气用除氧剂和杀虫剂等处理。
C. 系统的这部分被用于控制空气中的水分，控制臭氧浓度，过滤空调空气中的放射性碎屑，并在适用时使用除臭剂、杀虫剂等处理空气。
A. 当清洁带有绝缘层的喷管或排气锥时要小心。
B. 当移动带有隔离层的喷管或排气锥时要小心。
C. 当移动带有绝缘层的喷管或排气锥时要小心。
A. 如果是活页表，使用“标准”或通用的页面布局。
B. 如果发现松动的页面，使用“标准”或通用的装订页。
C. 如果是活页形式，使用“标准”或常用的页面大小。
A. STE was researched to help the writers of English-language file understand what they write, particularly when these writers are non-native English speakers.
B. STE is prepared to make readers of English-language documents know what they read difficultly, especially when these readers are native English speakers.
C. STE was developed to help the readers of English-language documentation understand what they read, particularly when these readers are non-native English speakers.
A. Section 1 of the Pilot＇s Operating Handbook shall introduce basic data and information of general interest to the pilot. The data and information is useful in loading, sheltering, handling, and routine preflight checking of the airplane.
B. Section 1 of the Pilot＇s Operating Handbook shall present basic data and information of general interest to the pilot. The general interest is useful in loading, sheltering, handling, and routine preflight checking of the airplane.
C. Section 1 of the Pilot＇s Operating Handbook shall present basic data and information of general interest to the pilot. The pilot is useful in loading, sheltering, handling, and routine preflight checking of the airplane.
