题目内容

汽车驾驶员小张患荨麻疹，为了保证其工作安全，可选用哪些药物

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符号和信号的区别有哪些？

[A] it refused to award her for her job
[B] she had to deal with rude members of the council
[C] it was responsible for her problems
[D] it denied her any clerical support

When would Uncle Smith be free？
[ A] On Saturday.
[B] From Monday to Friday.
[ C] On Sunday.

谈谈你对语言符号的暧昧性的认识。