A、 Dust can contaminate all areas.
B、 Dirts are contamination of all filters.
C、 Dust can cause contamination on all filters.
答案：C
A、 Dust can contaminate all areas.
B、 Dirts are contamination of all filters.
C、 Dust can cause contamination on all filters.
答案：C
A. 对于非FAA批准的飞机，其声明要写在飞行手册中。
B. 对非FAA批准的飞机飞行手册，做如下声明。
C. 在非FAA批准的飞行手册中要包括以下声明。
A. 接近和位置的说明会在这里给出不少信息。
B. 除非很困难，否则接近和位置的说明会在此给出。
C. 除非很明显，否则接近和位置的说明会在此给出。
A. 根据当地的正确程序使用或丢弃封严胶。
B. 遵守当地规定，正确使用或丢弃溶剂。
C. 遵守局方规定，正确使用或丢弃封严胶。
A. For vocabulary, only main alternation are highlighted, minor alternations to many approved and not approved examples are not highlighted.
B. For wordlist, only major changes are highlighted, minor changes to various approved and not approved examples are not highlighted.
C. For vocabulary, only main alternation are prominent, minor alternations to many approved and not approved examples are not prominent.
A. This is an installation procedure used by this typical fastener type.
B. This installation procedure is typical for this type of fastener.
C. It＇s typical to install the fastener according to this procedure.
A. 如果情况发生变化，则使用不同的材料。
B. 如果情况发生改变，则使用不同的建筑物。
C. 如果意思有变化，则使用不同的结构。
A. 用专用尺子确定凹坑的长度。
B. 用直尺和塞尺测量凹坑的深度。
C. 用角尺和直尺测量裂纹的深度。
A. If the filters become clogged after an unusually short time, send them to the laboratory for analysis of the contamination.
B. When the filters become clogged in an abnormal short time, send them to the library to analyze the contamination.
C. When the filters become blocked unconventionally after a very short time , send them to the lab for calculation of the contamination.
A. 如果杆被意外移动，请跳过测试。
B. 如果手柄意外移动，再做一次测试。
C. 如果重新测试，确保手柄不会意外移动。
A. Apply fuel to the steel surfaces.
B. Apply oil to the alloy surfaces.
C. Apply oil to the steel surfaces.
