食道癌时哪一段食管上多发是食管气管瘘()
A．颈段
B．上段
C．中段
D．下段
E．中上段
参考答案：E
等腰三角形的两条边分别是12cm和24cm，则这个三角形的周长是（ ）
A．48cm或58cm
B．60cm
C．48cm或60cm
D．48cm
I won the first prize and you can imagine how excited I was when the Mayor ________ me with the reward.
A．provided
B．supplied
C．presented
D．charged
