正确答案: C

three

题目：I have four letters to write today and I have finished_________．

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学习资料的答案和解析：

[单选题]A person a foreign language must be able to use the foreign language all his own.

learning, forgetting

[多选题]桡神经 （　　）

发自臂丛后束

支配肱三头肌和前臂所有伸肌

损伤后感觉障碍主要在手部“虎口”区皮肤