All the key words in the article are printed in _____ type so as to attract readers’ attention. ( 章节：4 难度：3)_做题室

单项选择题All the key words in the article are printed in _____ type so as to attract readers’ attention. ( 章节：4 难度：3): A、dark; B、dense; C、black; D、bold

正确答案：D
答案解析：
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