Cream is a yellowish oil-in-water______ which forms when milk is allowed to stand.

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问题 Cream is a yellowish oil-in-water______ which forms when milk is allowed to stand.

选项 A、emulsion
B、albumen
C、embrocation
D、yolk

答案A

解析 四个选项的意思分别是:emulsion乳剂;albumen蛋白;embrocation擦剂;yolk蛋黄。句意是,奶油是一种淡黄色的水包油乳剂,牛奶凝固就可形成奶油。所以正确答案是A选项,如:additives for photographic emulsion(感光乳剂添加剂)。
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