十二指肠球部前壁溃疡最常发生的并发症是（）
A.穿孔
B.幽门梗阻
C.胆囊炎
D.胰腺炎
E.出血
参考答案：E
What's the time? 它的同义句 _____.[ ]
A. What day is it today?
B. What time is it?
C. Where's the clock?
D. What's that?
冷硬橡胶不允许在开炼机上塑炼。
