婴幼儿容易发生急性化脓性中耳炎的主要原因是()
A.咽鼓管短、宽、平直
B.咽鼓管峡部较窄
C.咽鼓管发育不成熟
D.婴幼儿抵抗力低
E.婴幼儿上呼吸道感染较常见
参考答案:A
TD-LTE中特殊子帧不包含下列哪一个().
A、CP
B、GP
C、DwPTS
D、UpPTS
He became ________ his weaknesses and tried to overcome them.[ ]
A. fond of
B. aware of
C. proud of
D. sure of