右侧大脑中动脉狭窄，急性梗死灶发生在右侧内分水岭区，根据目前理论，最可能的发病机制是

能促进细胞凋亡的癌基因

A．myb
B．myc
C．ras
D．sis
E．src

短文改错(共10小题; 每小题1分, 满分10分)

文中有10处语言错误, 每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加: 在缺词处加一个漏字符号（∧）, 并在其下写出该加的词。 删除: 把多余的词用斜线（\）划掉。

修改: 在错的词下划一横线, 并在该词下面写出修改后的词。

注意:  1.每处错误及其修改均仅限一词;

2.只允许修改10处, 多者(从第11处起)不计分。

A minister was asked to dinner by one of his friend, which he knew was an untidy housekeeper. When he sat down at the table, he notices that the dishes were the most dirtiest he had ever seen in his life. “Were these dishes ever washed?” she asked. His friend replied, “They’re as cleanly as soap and water could get them.” He was a bit worried, so the food smelt so good that he couldn’t wait to start eat. He was happy, as the food was delicious, even though the dishes were dirty. Before dinner was over, his friend took the dishes outside and shouted her dogs,” Here, Soap! Here, Water!”

噬菌体是寄生在哪类生物细胞内的病毒[ ]

A．植物

B．动物

C．细菌

D．人

下列选项中，不符合我国民政部提出的城镇设置标准的是( )。

A．凡政府所在地，一般均可建镇
B．聚居人口在1万人以下的乡、乡政府驻地非农业人口和自理口粮到镇落户、务工、经商的人口合计超过1000人的，一般可以建镇
C．少数民族地区，人口稀少和边远地区和山区，可以适当放宽建镇标准
D．小型矿区、物资集散地、风景旅游区、边境商埠口岸等地，非农业人口和自理口粮人口两项总数量不足2000人，如确有必要，可设镇

下列杂剧作品产生于元代后期的有（）

A.《倩女离魂》

B.《秋胡戏妻》

C.《灰阑记》

D.《东堂老》