A、 Catalyst remains unchanged during the processing of chemical action.
B、 Catalyst is substance used to change the speed or rate of a chemical action with its molecular structure being changed.
C、 Catalyst is substance used to change the speed or rate of a chemical action without being physically changed itself.
答案：A
A、 Catalyst remains unchanged during the processing of chemical action.
B、 Catalyst is substance used to change the speed or rate of a chemical action with its molecular structure being changed.
C、 Catalyst is substance used to change the speed or rate of a chemical action without being physically changed itself.
答案：A
A. CONTAINS
B. COVERS
C. COMPRISES
A. 拆卸密封胶和钝铁锹。
B. 用锋利的铲子去除密封胶。
C. 用钝刮刀刮掉密封胶。
A. 位于连接发电机和驱动组件的法兰上的端口,使滑油在恒定转速驱动器和可用发电机之间流动。
B. 位于连接发电机和驱动组件的连接处的端口,使滑油产生了在变速驱动器和发电机之间流动的可能性。
C. 端口位于连接发电机和驱动组件的法兰上,使滑油可以在恒速驱动器和发电机之间流动。
A. When a warning, caution or note were in two or more paragraphs, the heading WARNING, CAUTION, NOTE, shall not be reminded above each paragraph.
B. When a warning, caution or note consists of two or more paragraphs, the heading WARNING, CAUTION, NOTE, shall not be repeated above each paragraph.
C. When a warning, caution or note were in two or more paragraphs, the foward word of WARNING, CAUTION, NOTE, shall not be repeated above each paragraph.
A. 降低天线以获得钢索接头。
B. 降低天线以接近电缆接头。
C. 降低风向标以接近钢索接头。
A. Since airplanes usually have long service lives, their flights are surly safe.
B. It is mandatory to ensure the flight safety for the long lives of airplanes.
C. Despite the long lives of airplanes, their flight safety cannot be assured.
A. Repair the broken seals
B. Repair the damaged sealant
C. Repair the damaging sealant
A. 如果飞机停在机坪上,确保轮子刹车在位。
B. 如果飞机停靠在廊桥,一定确保轮档在位。
C. 如果飞机停在斜坡上,确保轮挡在位。
A. 根据结构修理手册进行永久性修理,对损伤部位填充BMS-287填充剂。
B. 根据故障修理手册进行恢复性修理,对损伤部位填充BMS-287填充剂。
C. 根据勤务手册进行翻新修理,对损伤部位填充BMS-287填充剂。
A. Documents shall be easy to revise
B. Documents must be ready to revise
C. Documents shall be ready to change
