电子通信技术 : 英文影印版 | Electronic Communication Techniques : Fourth Edition影印版.pdf
本书为国外高校电子信息类优秀教材之一。本书介绍了电子通信的重点概念，包括幅度调制的传输，幅度调制的接收，单边带通信，频率调制的传输，频率调制的接收，通信技术等内容。
young
奈特绘图版医学全集——第2卷：内分泌系统（中文翻译版，原书第2版）.pdf
作者以通俗易懂的形式，简明扼要地介绍了人体内分泌系统的正常解剖、生理与异常状态下的相关改变，以及相关疾病的关键知识，垂体和下丘脑、甲状腺、肾上腺、生殖、胰腺、骨骼和钙、脂质和营养、遗传学和内分泌肿瘤等，并配以形象逼真、高度概括的绘图，将深奥的基础科学与临床医学融会贯通，瞬间使人领
亲爱的詹姆斯 : 写给年轻插画家的信 : letters to a young illustrator.pdf
本书作者以写给年轻插画家书信的形式，阐述了自己对于创作本质的认识，深刻而机智。
INTRODUCTION TO QUANTUM FIELD THEORIES.pdf
The purpose of this book is to introduce to the attendees modern methods used in quantum field theories and perturbation calculation techniq
光学与激光 : 工程物理方法.pdf
这是一本近代的应用光学书，内容涉及经典的几何光学和波动光学，激光，全息和相干光．在叙述时，作者着重问题的物理原理方面，而避免不必要的数学细节．所论述的每一个专题在光学设计方面都具有实际的工程价值． 本书适用于实验物理工作者和工程师，也可供高等学校的师生参考．
According to this passage, which of the following statements is FALSE?
According to this passage, which of the following statements is FALSE?
When I was young, I spent my summer vacations on my grandparents’ farm. The summer that I graduated from college, I (56)_____ my grandparents once again. When I arrived, I discovered that there was a family (57)_____ in progress. Grandpa’s dog
When I was young, I spent my summer vacations on my grandparents’ farm. The summer that I graduated from college, I (56)\_\_\_\__ my grandparents once again. When I arrived, I discovered that there
During a trip to observe wild animals in Africa, I encountered the least brave animal on earth, the wildebeest(角马). I sat on a riverbank for three hours watching a group of thousands build (56)_____ the courage to drink water. More than a million w
During a trip to observe wild animals in Africa, I encountered the least brave animal on earth, the wildebeest(角马). I sat on a riverbank for three hours watching a group of thousands build (56)\_\_\