Is thereanyonein your classwhichfamilyisin the country?ABC D
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This istheonlybookwhichI found usefulto my research.ABCD
The wayon whichhelooks atproblemsismuch tooideal.ABCD
The officialwhomwe appliedforapermitwas most obliging.A BC D
传统牛仔布使用的靛蓝染料，是属于下列哪种类型的染料？
A. 活性染料
B. 还原染料
C. 分散染料
D. 酸性染料
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