结构化程序设计方法虽然已得到了广泛的使用，但有两个问题仍未得到很好的解决：难以适应大型软件的设计和（ ）。

The theory of meaning which relates the meaning of a wo...

判断题The theory of meaning which relates the meaning of a word to the thing it refers to, or stands for, is known as the Referential Theory.（）

Which of the following is not a possible damage by UV r...

未知题型Which of the following is not a possible damage by UV radiation Which of the following is not a possible damage by UV radiation

（ ）是声音的基础，是歌唱的动力和根本。A、气息B、共鸣C、真声D、假声

单项选择题（ ）是声音的基础，是歌唱的动力和根本。