临床上环杓关节脱位的诊断要点是()。
A.声门闭合时有间隙
B.声带粘膜充血、肿胀
C.一侧声带固定不动或受限
D.杓区粘膜肿胀,有触痛
E.声带中后1/3处息样肿物
参考答案:C
主持开凿大运河的帝王是 [ ]
A.隋文帝
B.隋炀帝
C.唐太宗
D.杨坚
Blue whales are the largest and heaviest animals in the world, but they ______ the smallest sea animals. [ ]
A. feed in
B. live in
C. feed on
D. fed on