A、 Because of the risk of contamination, you must do this task in a very clean environment.
B、 To prevent environmental pollution, this task must be done in a very clean area.
C、 In order to prevent contamination, the task you must do is to find a very clean environment.
答案：A
A、 Because of the risk of contamination, you must do this task in a very clean environment.
B、 To prevent environmental pollution, this task must be done in a very clean area.
C、 In order to prevent contamination, the task you must do is to find a very clean environment.
答案：A
A. Water above the kitchen floor can seep in through small holes in the floor surface, invisible to the naked eye.
B. Eyes cannot see the vapor which may penetrate through small holes of the floor surface in the galley.
C. Moisture above the galley floor can go through small holes in the floor surface area and stay out of view
A. In order to revise, supplement an delete the printed maternal, a perpendicular black line must be use to identify the changed portion along the margin of the page
B. Whenever the printed matter is to be revised, replenished or updated mark a black cross on the right margin of the page opposite to the changed portion.
C. A vertical black line should be drawn to make any revision, addition and deletion along the outside of the page opposite to the changed ciontents.
A. If an annunciator panel TRANSIT light fails to illuminate while the corresponding device is in motion, then this light must be considered inoperative.
B. When related device is in operation and if annunciator panel TRANSIT light comes on so this light does not work.
C. The light is considered to be available if the annunciator panel TRANSIT light goes off when the related device is in motion.
A. Maneuvering Speed is the maximum speed what required of full uncommitted aerodynamic control will not exceed the airplane.
B. Maneuvering Speed is the largest speed that the aerodynamic application by the full available control will not cause the aircraft overexert.
C. Maneuvering Speed is the maximum speed at which application of full available aerodynamic control will not overstress the airplane.
A. Connect the cover immediately.
B. Attach the cover temporarily.
C. Install the cover permanently
A. 不论是否对齐,文本应该准备为一列而不是两列。 警告,警示和注意可以用于突出或强调要点。
B. 不论是否对齐,文本可以准备为一列或者两列。 警告,警示和注意可以用于突出或强调要点。
C. 不论是否对齐,文本可以准备为一列或者两列。 警告,注意和警示可以用于突出或强调要点。
A. 拧紧这些同轴接头(用手上紧再1/8转)
B. 拧紧这些同轴接头(用手上紧少1/8转)
C. 拧紧这些同线路接头(用手上紧少1/8转)
A. 把螺帽拧松1圈
B. 拧紧螺帽半圈
C. 拧紧螺帽1圈
A. 确保束缚杆没有与安装在地板上的逃离滑梯支架啮合。
B. 确保束缚杆没有装在地板上的逃离滑梯支架上。
C. 确保束缚杆没有与在地板上的逃离滑梯支架对齐。
A. 一体式电路一般包括一体式部件以及以单片结构执行完整电路功能的器件。
B. 集成电路一般包括那些具有集成元件、以单片结构执行完整电路功能的器件。
C. 集成电路总是包括那些具有一体化元件、以整体结构实现完整电路功能的器件。
