判断题

The reason these are called front vowels is that the tongue body is shifted backward.
正确
错误

答案：错误

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单项选择题

下列化合物属于季铵碱的是
A、
B、
C、
D、

Malcolm X's considerable frustration at his inability to read and write launched him on a quest to overcome his deficiencies.

答案：马尔科姆X 在阅读和写作上面遭受了巨大挫折，这促使他开始探索如何才能克服自己的语言障碍。