平板上青霉菌落周围葡萄球菌不能生长，两者之间为（）关系_爱下问搜题

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问题单项选择题

平板上青霉菌落周围葡萄球菌不能生长，两者之间为（）关系。

A．竞争

B．拮抗

C．共生

D．互生

答案

参考答案：B

单项选择题 A3/A4型题

患者男性．45岁，胃脘疼痛日久，疼痛有定处而拒按，食后痛甚，舌质紫暗，脉涩。若失血日久，症见心悸少气，多梦少寐，体倦纳差，唇白舌淡，脉虚弱者，可选用（）

A.六君子汤

B.香砂六君子汤

C.四物汤

D.归脾汤

E.酸枣仁汤

完形填空

Having written a book on rock music and a book on jazz music, and now writing a book __31__ the classical music of the 20^th century, I felt the __32__ to put somewhere the music that does not quite fit __33__ of these kinds of music. I also felt that I needed to research the beginning of the popular music in Western Europe and the USA in order to __34__ understand the change of the jazz and rock music. I also felt that ethnic music has become so __35__ that one should research the development from Western European and USA music. This book aims at __36__ all these gaps (差异). I did my best to give it a systematic feeling, although it is clear that musicians from such different parts of the world had very __37__ in common. Only after the joining together of the 1907s can we __38__ of a worldwide history of popular music. This book is about the __39__ of that formation (形成).
It was not very difficult to decide how to __40__ jazz music from pop music. It was much more __41__ to decide how to separate rock music __42__ the rest of popular music, because rock music has taken in just about everything. Pieces of this book were firstly written for my 2003 books on rock music. __43__ that happened after the 1960s will be in the book on rock music. The __44__ is that you should read this book first, then the __45__ of jazz music and the history of rock music.