更换油滤是强制的要求。

A. Do not use verbs that are general and vague.

B. Do not use verbs that are normal and mixed.

C. Do not use verbs that are usual and blended..

A. 关键字、开关及杠杆在“条件栏”大写。

B. 大写关键词的开关和杠杆位置。

C. “条件栏”中的关键字或开关及手柄位置使用大写。

A. Sudden changes in temperature can adjust the internal logic.

B. The internal logic adjusts to sudden changes in temperature.

C. The internal logic can be adjusted by sudden changes in temperature.

A. The reason why long collocations make non-native English readers confusing is that the key word is the first one in the collocation in some languages.

B. Non-native English readers also feel confused with long noun phrases because of the great importance of the first noun in the phrase in some languages.

C. Long noun clusters are also confusing for non-native English readers, because in some languages the main noun is the first noun in the cluster.

A. 为增压飞机和涡轮增压或涡轮螺旋桨动力的飞机，最大高度限制应该予以说明。

B. 对于增压的飞机以及涡轮增压或涡桨为动力的飞机，应规定最高飞行高度限制。

C. 为飞机增压和发动机涡轮增压或螺旋桨动力设置，应说明最高限制。

A. 安装程序中，请佩戴防护罩。

B. 焊接过程中，请佩戴防护罩。

C. 在拆卸程序中，请佩戴防护罩。

A. Apply two films of protective compound to prevent hydraulic fluid from damaging to the sealant.

B. Apply two layers of protective compound to prevent hydraulic fluid damage to the sealant.

C. Two coats of sealing compound should be applied to prevent hydraulic fluid damage from the sealant.

A. 查找损伤。

B. 看一下损伤。

C. 检查损伤。

A. The shim is t,which is thick by calculating x and y.

B. Calculate the shim,the result of the thickness is x-y .

C. The thickness of the shim is thus calculated: t=x-y.

A. 原理图的使用者是维修人员。

B. 工作图纸的使用者是维修人员。

C. 原理图用于机械专业。