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单选题
400、如果在密闭空间使用溶剂,请确保工作区域有良好的空气流通。
A
You can not use sealant in enclosed space on condition that there is no good ventilation.
B
If you use solvent in a closed space,make sure that there is good airflow in the work area.
C
When using composite in confined space,make sure it has good ventilation.
答案解析
正确答案：B
解析：
解析:注释: sealant 密封剂,密封胶; solvent 溶液;composite 合成物。
相关知识点：
密闭空间用溶剂，确保通风良好
