西晋八王之乱后，北方游牧民族趁此时机陆续建立政权，这段时期被称为

Filling in the blanks with correct words or phrases. In...

问答题Filling in the blanks with correct words or phrases.
In both Chinese and English, there are four main ways to form a new word, namely, (1), (2) (3),(4).
(5) and(6) are the two main categories of words in Chinese and English.
(7) are a unique type of compounds to the English language.
In English, an affix can be either a (8) or a (9).
In Chinese, (10) usually contain no actual meanings while (11) usually contain actual meanings.

突发胸部剧痛伴呼吸困难和发绀，常提示（）

未知题型突发胸部剧痛伴呼吸困难和发绀，常提示（）

周年降雨量很少，气候干燥，多为不毛之地，这样的地区属于。

未知题型周年降雨量很少，气候干燥，多为不毛之地，这样的地区属于。