JPG格式是常见的图像文件格式，它采用了（）的压缩方式，通常用于存储自然风景照、人和

温病症见发热，微恶风寒，咳嗽少痰，咽干唇燥，头痛，苔薄白，舌边尖红等。治宜：（）

There are only _______ natural resources as there were thirty years ago. [ ]

A. as half much

B. as half many

C. half as much

D. half as many

      —Shall we go out for a walk?

—Sorry, I can’t. I _______ my homework.

A．do

B．did

C．am doing

D．was doing

在HP-UX系统中，（）命令可以改变正在运行的进程的优先级。

A.nice

B.renice

C.pri

D.ni

男性24岁：舌出现白色病损5年，加重半年。查：舌背两侧各有2块1～1.2cm白色斑块，边缘不齐，下唇内侧黏膜有条形白纹。临床诊断应与哪种疾病鉴别()

A．球菌性口炎

B．扁平苔藓

C．癌性溃疡

D．单纯疱疹

E．白念珠菌病