每种期刊的开本大小和（）一般都是每期固定不变的。 A.页面数量 B.栏目设置 C.文

患者，女性，43岁，患风湿性心脏病二尖瓣狭窄15年，伴心房颤动1年余，在做家务时突然发生下腹部剧烈绞痛，最可能的诊断为（）。

A.主动脉夹层

B.急性心肌梗死

C.肺动脉栓塞

D.输尿管结石

E.肠系膜动脉栓塞

奠定三国鼎立局面形成的战役是[ ]

A．官渡之战

B．赤壁之战

C．淝水之战

D．巨鹿之战

Mo Yan said he would never forget those years ________ he lived in his hometown with his family, ________ has a great effect on his life.

A．when; that

B．that; which

C．which; who

D．when; which

There _____ a desk, two beds and four chairs in the room. [ ]

A. is

B. are

C. has

D. have

()烟草专卖执法人员严禁不出示证件执法或单人执法。