A、 描述飞机螺旋桨时，如果合适，应阐述正桨、反桨和反转。
B、 描述飞机螺旋桨时，如适用，应描述顺桨、解除顺桨和反桨相关信息。
C、 描述飞机螺旋桨时，如果合适，应讨论顺桨、不反桨和反推。
答案：B
A、 描述飞机螺旋桨时，如果合适，应阐述正桨、反桨和反转。
B、 描述飞机螺旋桨时，如适用，应描述顺桨、解除顺桨和反桨相关信息。
C、 描述飞机螺旋桨时，如果合适，应讨论顺桨、不反桨和反推。
答案：B
A. Maintenance should be accomplished preventively in accordance with the airplane service or maintenance manual.
B. Appropriate airplane service or maintenance manual shall be developed for the accomplishment of preventive maintenance.
C. Preventive maintenance should be accomplished in accordance with the appropriate airplane service or maintenance manual.
A. 自动油门里有起激活、感知、计算、信号放大、控制、作动和警告作用的设备，例如放大器、计算机、伺服器、限位开关、轴、齿轮箱、警告灯等。
B. 自动油门里有起连接、感知、计算、信号放大、控制、作动和警告作用的设备，例如放大器、计算机、伺服器、限位开关、轴、齿轮箱、警告灯等。
C. 自动油门里有起接通、感知、计算、信号放大、控制、作动和警告作用的设备，例如放大器、计算机、伺服器、限位开关、离合器、齿轮箱、警告灯等。
A. 盖子朝下的时候，是开关在开位的一种保护。
B. 封面在下面的时候，是开关在开位的保险。
C. 盖子朝下的时候，是开关在开位的保险。
A. 每一个点处的宽度和深度值不能小于30。
B. 每一个点处的宽深值不能大于30。
C. 每一个点处的宽深比不少于30。
A. 该词典还提供了一些未经批准的词汇，并举例说明了如何使用替代词汇。
B. 词典还提供了一些未经批准的单词选项，并举例说明如何使用更改单词。
C. 词典还给未经批准的单词提供了选择，并举例说明如何使用未经批准的替代词。
A. 1号和2号发电机为其对应的机翼供电。
B. 1号和2号发动机为其对应的机翼提供热空气。
C. 1号和2号发动机为相关的机翼释放热空气。
A. If you drink contaminated water , illness must happen.
B. You may be in trouble, if you drink bacteria free water.
C. If you drink water that contains bacteria, you will get sick.
A. The aim of STE is that readers all over the world can easily understand the technical texts and that writers who are responsible for preparing technical texts know how to prepare them in a easy method.
B. The objective of STE is to provide writers with general principles on how to prepare technical documents in a clear, simple and distinct manner that readers all over the world can easily understand.
C. The function of STE is to describe how to prepare technical texts in a easy, clear and specific way and to allow readers all over the world to understand difficultly.
A. It is suggested that nickel plated corrosion resistant steel or nickel plated steel fittings be used as alternatives for aluminum fittings in the high pressure and normal brake return systems between the antiskid module and parking brake module.
B. Suggest to use vanadium plated corrosion resistant steel or vanadium plated steel fittings as alternatives for aluminum fittings in the high pressure and normal brake return systems between the antiskid module and parking brake module.
C. It is recommended that cadmium plated corrosion resistant steel or cadmium plated steel fittings be used as replacements for aluminum fittings in the high pressure and normal brake return systems between the antiskid module and parking brake module.
A. 更换滑阀，确保其表面光滑。
B. 如果滑阀表面粗糙，则将其更换。
C. 如果活门表面粗糙，则更换其滑动桶。
