下列哪个是会议表决系统的功能。()
A.传译
B.会议传送
C.会议扩声
D.会议主持
参考答案:D
The lawyer rarely wears anything other than jeans and a T-shirt _____ the season. [ ]
A. whatever
B. wherever
C. whenever
D. however
上消化道出血可发现()
A.尿酮体(+)
B.尿中白细胞>5个高倍视野
C.柏油便
D.血红蛋白<110g/L
E.大量管型尿