2148. Use a 12-inch wrench handle during this procedure

A. This proposed method is to reduce the errors of distribution to the lowest possible level. It also let the owner know that the systems and equipment are available.

B. In order to decrease the distribution errors, this way is mandatory to tell the owner about the status of systems and equipment.

C. Because the errors of distribution is minimum,this method is used to notify the owner to get the systems and equipment.

A. 页码在右下角,发行日期在左下角

B. 页码在左下角,颁发日期在右下角

C. 颁发日期在右上角,页码在左下角

A. China＇s first large passenger plane C919 flew successfully on May 5.—Yes. What＇s more, it was built with some help in Shanghai.

B. China＇s first large passenger plane C919 flew successfully on May 5.—Yes. What＇s more, it was built from our friends in Shanghai.

C. China＇s first large passenger plane C919 flew successfully on May 5.—Yes. What＇s more, it was built by ourselves in Shanghai.

A. 一旦设计和批准,必须建立彻底的维修程序

B. 一旦设计和授权,必须建立全面的勤务工艺

C. 一旦设想和批准,必须建立全面的修理程序

A. Make sure the wire in this position is able to unlock the parts.

B. The wire must be positioned so that the parts can oscillate freely.

C. Ensure the wire is positioned to create a locking motion on parts.

A. 在两个点之间做标记

B. 在两条线的交点处钻孔

C. 检查交汇处的孔

A. Examine the doorstop fittings for cracks and corrosion.

B. Examine the doorstop fittings for dent and corrosion.

C. Examine the doorstop fittings for cracks and nick.

A. If the drain hole is blocked, clean it.

B. If the drain hole is leaked, clean it.

C. If the drain hole is locked, clean it.

A. 所有人员必须充分了解安全预防措施

B. 所有人员必须充分了解安全规定

C. 所有人员必须充分了解逃生方法

A. Use the upper latch mechanism to lock the lower display unit in the middle.

B. The latch mechanism at the top is used to secure the center display unit on the bottom.

C. The center lower display unit is installed with the latch mechanism at the top.