Very few people could understand the lecture the professor delivered because its

游客2024-09-09  13

问题 Very few people could understand the lecture the professor delivered because its subject was very ______.

选项 A、obscure
B、indefinite
C、dubious
D、intriguing

答案 A

解析 obscure表示“不易看清的;令人费解的;不清楚的”;indefinite表示“不确定的;不明确的”,但未必就难以理解;dubious表示“可疑的;无把握的”;intriguing表示“饶有兴趣的;迷人的”。根据句意可知应选A项obscure。
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