Make sure that the lock nut touches the spring.

A. Make an estimate of the necessary quantity.

B. Evaluate on the quantity available.

C. Approximate the scale of the quality.

A. Using either method, the item to be checked is in the list of the desired condition.

B. Either way, check the listed item whose desired condition is stated.

C. No matter which method is used, the item to be checked is listed and its desired condition is presented.

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. 这个过滤器能除去空气供应中的所有污染物。

B. 使用这个过滤器可以有效减少空气供应中的污染程度。

C. 这个过滤器能够净化供应的空气，完全消灭颗粒物。

A. Connect the cover immediately.

B. Attach the cover temporarily.

C. Install the cover permanently.

A. If you use solvent in a closed space, make sure that there is good airflow in the work area.

B. When using composite in confined space, make sure it has good ventilation.

C. You can not use sealant in enclosed space on condition that there is no good ventilation.

A. Vigorously scrub the surface with a rough, dry cloth.

B. Polish the surface with a soft, damp cloth.

C. Rub the surface quickly with a soft, dry cloth.

A. This Program usually includes two pages: one writing page and one drawing page.

B. This Program usually contains two pages: one test page and one image page.

C. This Program usually consists of two pages: one text page and one illustration page.

A. 将钢索拼成三段那么高。

B. 将电缆剪成三等份那么宽。

C. 将钢索剪成等长的三段。

A. Warning is an operating procedure, inspection , repair or maintenance practice , which if not correctly followed, could result in personal injury , or loss of life.

B. You should obey the warning in an operation procedure, check, repair or maintenance practice, otherwise person injury or death will happen.

C. Warning in an operation procedure, inspection , repair or maintenance practice should be followed seriously, whereas may involve in personal injury , or loss of life .