什么叫温标？
参考答案：
温标是衡量物质温度的标尺。
Bats are surprisingly long-lived creatures, some ______ a life span of around 20 years.
A. having B. had C. have D. to have
肾盂癌最常见症状是
A．高血压
B．腰部包块
C．肾绞痛并有血尿
D．间歇无痛性血尿
E．精索静脉曲张
