格林-巴利综合征病程进展中最主要的危险是
A．肺部感染
B．肢体瘫痪
C．吞咽困难
D．消化道感染
E．呼吸肌麻痹
参考答案：E
What do you find difficult in learning English?（）
A.Listening and speaking.
B.Don‘t be afraid of difficulties.
C.Learning English is useful.
D.Don‘t be disappointed.
红尾灯有何作用？
