With lots of trees and flowers________here and there，the city looks very beautiful.[ ]

A．are planted  

B．planted

C．to be planted  

D．planting

男性患者，30岁，反复发作晨醒时肢体对称性瘫痪，今晨再次出现上述症状。查体：四肢弛缓性瘫，肌力2级，肌张力下降，无感觉障碍，无尿便障碍，为确诊应做下列何种检查

A．腰穿

B．肌电图

C．血清钾

D．血清钠

E．疲劳试验