A、 Before drill the hole, make sure that the point of the drill head is sharp.
B、 Prior to drill the hole, make sure that the point of the drill bit is sharp.
C、 Before you make the hole, make sure that the point of the drill bit is sharp.
答案：C
A、 Before drill the hole, make sure that the point of the drill head is sharp.
B、 Prior to drill the hole, make sure that the point of the drill bit is sharp.
C、 Before you make the hole, make sure that the point of the drill bit is sharp.
答案：C
A. Guarantee a consistent performance of the probe.
B. Maintain an uninterrupted movement of the probe.
C. To ensure continuous movement, the probe must be kept in motion.
A. The manufacturer shall prepare all text in either one or two columns with justification at his own discretion , but, two columns are preferable for readability.
B. Manufacturers shall prepare all text both in one and two columns separately; however, two columns are better for reading.
C. According to the manufacturer＇ explanations, all text shall be prepared in one or two columns; however, two columns have better visual effect.
A. 如果没有必需的修理程序，仔细检查燃油渗漏来确保不会渗漏更多。
B. 没有必须的维修程序。检查燃油使用频率确保使用量不会变大。
C. 无需执行修理程序。经常检查燃油渗漏情况，确认区域没有扩大。
A. 空调的分配系统用来引导和分配空气。包括设备架的冷却系统和送风机、进气口（飞机内部）、管路、进气口（飞机外部）、单向活门等部件。不包括在温度和压力控制部分的活门。
B. 空调的分配系统用来引导和分配空气。包括设备架的冷却系统和送风机、进气口（飞机外部）、管路、进气口（飞机内部）、单向活门等部件。不包括在温度和压力控制部分的活门。
C. 空调的分配系统用来诱导和分配空气。包括设备舱的冷却系统和送风机、进气口（飞机内部）、管路、进气口（飞机外部）、单向活门等部件。不包括在温度和压力控制部分的活门。
A. To download the file, click here.
B. To load the document, click here.
C. Tap here to get the document.
A. The tank recirculating system lets the air in or out of the fuel tanks if necessary.
B. The tank absorbing system lets the air in or out of the fuel tanks as necessary.
C. The tank venting system lets the air in or out of the fuel tanks as necessary.
A. To know what you want to say and to use the words that give the wanted meaning shall always be assured.
B. In order to express the meaning that you want, always make sure that you know what you want to say and you use the words.
C. Always make sure that you use what you want to say to express the words with the meaning that you want.
A. This section includes limitations adapted by the airworthiness authority.
B. The limitations included in this Section are approved by the airworthinessauthority.
C. The limitations included in this Section are adopted by the airworthiness authority.
A. The localizer beam is aligned with the centerline of the runway.
B. The localizer way is misaligned with the centerline of the runway.
C. The localizer course is aligned with the centerline of the runway.
A. 有24片宽弦钛合金风扇叶片。
B. 有24片宽弦合金钢风扇叶片。
C. 有弦宽为24的钛合金风扇叶片。
