A、 The swivel nuts on both valves engage threads on an internal stem that loosens or draws tight the valve stem to a metal seat.
B、 The rotating nuts on both valves are meshed with the threads on the inner valve stud, so that the valve stud is loosened or tightened to a metal valve base.
C、 The swing nuts on both valves engage with the threads on the internal spool, allowing the spool to loosen or tighten to the metal seat.
答案：A
A、 The swivel nuts on both valves engage threads on an internal stem that loosens or draws tight the valve stem to a metal seat.
B、 The rotating nuts on both valves are meshed with the threads on the inner valve stud, so that the valve stud is loosened or tightened to a metal valve base.
C、 The swing nuts on both valves engage with the threads on the internal spool, allowing the spool to loosen or tighten to the metal seat.
答案：A
A. Always remember that the main subject of STE is for readers to hardly grasp each sentence they read.
B. Always remember that the major function of STE is to let readers comprehend every sentence they read barely.
C. Always remember that the primary objective of STE is that readers immediately understand each sentence that they read.
A. 找到中点，然后将测量出的数据除以2。
B. 为找到中点，将测量出的间隙除以2。
C. 找到中点，用2除以测量出的间隙。
A. 当替换某个单词时，一定要确保所选择的替代词不会改变句子的意思。
B. 如果需要替换某个单词，从备用词汇中选择合适的词以确保不会改变句子含义。
C. 当替换某个单词时，始终要确保不要变动句子的意思和结构。
A. This procedure gives the inspection sources of the sixth stage low pressure bleed air blade.
B. This procedure shows the inspection instruction of the sixth stage low pressure bleed air blade.
C. This procedure has the inspection progress of the sixth stage low pressure bleed air blade.
A. Schematics must be readable to a normal visioned person, so legends, symbols, devices, codes, etc., should be of sufficient size. The schematic diagram should be designed to turn over the page when the content is necessary.
B. The schematic diagram must be of sufficient size that legends, symbols, devices, codes, etc., are readable by persons with normal vision. Turn-page schematic diagrams shall be avoided to the extent practical.
C. The schematics, symbols, devices, codes, etc. must be legible, so people with normal vision should avoid turning the schematic pages as much as possible.
A. 找出液压油渗漏的源头。
B. 找出滑油溢出的源头。
C. 找出燃油泄漏的源头。
A. Do not extend or retract landing gear above this speed.
B. Do not lower or retract landing gear exceed this speed.
C. Do not lower or lift landing gear within this speed.
A. 总体来说，作者可以使用字典中的典型词汇作为核心词汇。
B. 基本上，作者可以使用字典中批准的词汇作为核心词汇。
C. 基本上，作者从字典中选用的词汇都是核心词汇。
A. 残留在零件上的溶剂会导致腐蚀。
B. 残留在零件上的油液会导致腐蚀。
C. 残留在零件上的溶剂会导致穿孔。
A. 关键词汇常常发生在文字中用于连接不同的思想。
B. 关键词汇常常出现在文中用于连接不同的想法。
C. 关键词汇常常闪现在课文中用于连接不同的想法。
