Be careful with easily damaged parts.

A. To open the containers for these materials, suitable tools must be used.

B. The appropriate tools should be selected to open the materials, the containers is inside the materials.

C. The inappropriate tools should be selected to open the containers, the containers is made in the materials.

A. Use some auxiliary screws to assemble the unit temporarily.

B. You shall use some additional screws to install the unit permanently.

C. Temporarily disassemble this unit using some auxiliary screwdrivers.

A. 用钝刮刀去除密封胶。

B. 用尖锥去除密封剂。

C. 用塑料刮刀去除封圈。

A. Keep all the parts that are serviceable and discard those that are broken.

B. Retain the parts that are functional and discard those that are of poor condition.

C. Keep all the parts that are operational and drop those that are contaminated.

A. Make an estimate of the necessary quantity.

B. Evaluate on the quantity available.

C. Approximate the scale of the quality.

A. When it is unlikely that the temperature decreases to -20 ℃, remove the batteries.

B. If it is possible that the temperature will decrease to -20 ℃, remove the batteries.

C. If it is possible that the temperature will decrease to -20 ℃, cut the cells.

A. 小心修理损伤的零件。

B. 小心易损伤的零件。

C. 对于损伤的零件要小心。

A. 作对比的代词和把“more”和“most”作为最高级的代词在字典中不会列出这些形式，因为“more”和“most”也列出了批准的词。

B. 以“more”和“most”作比较级和最高级的形容词不会在字典中列出这些形式，因为“more”和“most”也被列为批准词。

C. 有比较级和最高级的副词由“more”和“most”构成，不会被收录在词典中，因为“more”和“most”也列出了被允许的词。

A. 防腐有很多方法。

B. 腐蚀可能有很多原因。

C. 修正的方法有很多。

A. Turn the handle of the door until the lower gate is lifted.

B. For lowering the upper door, door handle should be turned.

C. The lever of door should be turned until the lower door opens.