题目内容

We can spray ______________in order to eliminate the old grease and oil residue.

A. water
B. anti-corrosion solution
C. Detergent
D. washing-up liquid

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We can’t use _________to remove the dried bits of dirt and old grease.

A. cleaning paper
B. toothbrush
C. polishing paste
D. nail file

If the spindles are covered in resin, we can use ___________ to clean.

A. solution
B. Toothbrush
C. wooden wedge
D. toothpaste

What does the word "goove" mean?

A. 凹槽
B. 桶
C. 轴承
D. 主轴

预计在____________的土壤中能发现真菌。

A. 富含氮化合物
B. 酸性
C. 中性
D. 细菌和原生动物