People living in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. Each contains many thousands of words. A very large English dictionary, for example, contains four or five hundred thousand words. But we do not need all these. Only a few thousand words are used in everyday life.
The words you know are called your vocabulary. You should try to make your vocabulary bigger. Read as many books as you can. There are plenty of books written in easy English for you to read. You will enjoy them. When you meet a new word, find it in your dictionary. Your dictionary is your most-useful book.
From this passage, we know that
A.man never made sounds
B.man made animal sounds
C.man used to be like animals to make sounds
D.man learned from the animals to make sounds
第1题
A.外科疗法的目的在于消灭死腔
B.胸腔引流,治愈的多
C.胸部X线检查对支气管胸膜瘘的诊断无意义
D.急性脓胸处理不当,可转为慢性脓胸
E.慢性脓胸体格检查时见肋间增宽
第2题
以下为治疗慢性脓胸常用的手术方法,但哪项除外
A.改进引流方法
B.胸膜纤维板剥脱术
C.胸廓成形术
D.塑料球填塞术
E.胸膜肺切除术
第5题
下列哪一项不是治疗慢性脓胸常用的手术方法
A、塑料球填塞术
B、改进引流方法
C、胸廓成形术
D、胸膜纤维板剥离术
E、胸膜肺切除术
第6题
以下哪一项不是治疗慢性脓胸常用的手术方法
A.塑料球填塞术
B.改进引流方法
C.胸廓成形术
D.胸膜纤维板剥离术
E.胸膜肺切除术
第7题
下列哪一项不是治疗慢性脓胸常用的手术方法?
A.塑料球填塞术
B.胸膜纤维板剥离术
C.胸廓成形术
D.改进引流方法
E.胸膜肺切除术
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