问题 单项选择题

关于抑癌基因的叙述,正确的是

A.具有抑制细胞增殖的作用

B.与癌基因的表达无关

C.缺失与细胞的增殖和分化无关

D.不存在于人类正常细胞中

E.肿瘤细胞出现时才表达

答案

参考答案:A

完形填空

第一节 完成句子(共10小题;每小题2分,满分20分)

小题1:The scientist                         when he was in trouble. (lose)

这名科学家在困境中从不灰心。

小题2:It was the third time that                       this mountain village to see the children. (come)

这是她第三次来到这个山村看望这些孩子。

小题3:Only then                         to answer violence with violence. (decide)

直到那时我们才决定以暴制暴。

小题4:Yesterday I met Li Ping,                         very busy. (seem)

昨天我遇到李平,他看上去很忙碌。

小题5:The box has been moved. Someone                         here last night.  (must)

这盒子被移动了,昨晚一定有人来过。

小题6:To be honest, a lot of people                      becoming rich and famous. (attach)

说实在的,很多人把名和利看得很重要。

小题7:After that,                         the Amber Room remains a mystery. (happen)

从那以后,琥珀屋发生了什么仍然是个谜。

小题8:Only athletes who have reached the agreed standard for their event                    competitors. (admit)

只有达到他们各自项目统一标准的运动员才将会被接受为竞赛者。

小题9:A decision                         that we will begin a computer teaching experiment in our school. (make)

已经决定我们将会在学校开展计算机教学实验。

小题10:They produced a new record in 1996,                         their former time as a real band. (which)

1996年他们发布了一张新唱片,以此来庆祝他们之前作为一支真正乐队的时光。

选择题