我国的“城市”行政概念是指：（）
A、直辖市
B、建制市
C、建制镇
D、集镇
参考答案：A, B, C
引起肺炎球菌肺炎低氧血症的原因是（）。
A.痰液阻塞气道
B.支气管痉挛
C.高热
D.V/Q<0.8
E.V/Q>0.8
She was so angry with the young man that she______________him and rushed out into the dark night. [ ]
A. smiled at
B.danced with
C. glared at
D. played with
