依我国现行合同法的规定，要约生效的时间为( )
A．要约发出之时
B．要约到达受要约人时
C．要约人了解要约内容时
D．承诺作出之时
参考答案：B
用所给词的适当形式填空。
1. We all like________ (play) soccer.
2. I find he________ (watch) TV in the next room.
3. The students should practice________(write) and reading every day.
4. Mr. Hu loves________ (take) a walk near the river.
5. There ________ (be) a few people in the park.
男性，50岁，“胃痛”史15年。近年来消瘦、乏力，持续性呕吐宿食，胃痛规律改变，伴腰背痛。
最可能的诊断是（）
A.胃窦癌
B.多发性溃疡
C.瘢痕性幽门梗阻
D.萎缩性胃炎
E.胃后壁溃疡浸润至胰腺
