延髓外侧综合征表现为()
A.同侧面部痛、温觉丧失
B.同侧躯干、四肢痛、温觉丧失
C.对侧面部痛、温觉丧失
D.对侧躯干、四肢痛、温觉丧失
E.发音、吞咽困难
参考答案:A, D, E
. He arrived at last, ________ .
A.tired and hungrily
B.tiredly and hungrily
C.tired and hungry
D.tired and hunger
某双链DNA纯样品含15%的A,该样品中G的含量为()。
A.35%
B.15%
C.30%
D.20%
E.10%