绵羊蓝舌病表现口流涎,()水肿,可蔓延到整个面部。
A、下唇
B、鼻部
C、上唇
D、眼部
参考答案:C
He wasn't dead after the traffic accident and is still ______ now. [ ]
A. living
B. live
C. alive
D. lives
双调谐放大器调试时,若其带宽不够时,可采措施是()。