慢性肾盂肾炎早期肾功能不全的表现是（）
A.多尿，尿比重降低
B.高血压
C.水肿
D.尿蛋白增多
E.血尿
参考答案：A
I have ______ friends at school. I like playing with ______. [ ]
A. much; they
B. many; them
C. a lot of; their
D. lots of; theirs
自我介绍时应注意哪些礼仪？
