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【多选题】
在Windows 7操作系统中,关闭应用程序窗口方法正确的有:A.
按Ctrl+F4键
B.
单击“文件”菜单下的“退出”命令
C.
按Alt+F4键
D.
按Shift+F4键
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【多选题】关于病毒癌基因的叙述正确的是
A.
主要存在于RNA病毒基因中
B.
在体外能引起细胞转化
C.
感染宿主细胞能随机整合于宿主细胞基因组
D.
又称为原癌基因
E.
感染宿主细胞能引起恶性转化
【单选题】How did Christy McKinley know Ms. Schatzman's opinion of the chi tea?
A.
She met her in the shop.
B.
She heard her telling others.
C.
She talked to her on the phone.
D.
She went to her office to deliver the tea.
【单选题】关于病毒癌基因的叙述正确的是
A.
使人体直接产生癌
B.
遗传信息都储存在 DNA上
C.
含有转化酶
D.
可以将正常细胞转化为癌细胞
E.
以 RNA为模板直接合成RNA
【单选题】关于病毒癌基因和细胞癌基因，叙述正确的是（ ）
A.
细胞癌基因来源于病毒癌基因
B.
病毒癌基因来源于细胞癌基因
C.
细胞癌基因不含有内含子或插入序列
D.
病毒癌基因含有内含子或插入序列
E.
病毒癌基因与细胞癌基因在结构上差异很大
【简答题】Ⅱ.完形填空 30分 Mrs White was a wealthy lady. She lived 16 in a large comfortable house where her children and grandchildren came to visit her frequently. However, she was 17 . She spent a lot of t...
【单选题】关于病毒癌基因的叙述正确的是
A.
主要存在于朊病毒中
B.
在体外不能引起细胞转化
C.
感染宿主细胞能随机整合于宿主细胞基因组
D.
又称为原癌基因
E.
可直接合成蛋白质
【单选题】关于病毒癌基因的叙述正确的是（）
A.
主要存在于朊病毒中
B.
在体外不能引起细胞转化
C.
感染宿主细胞能随机整合于宿主细胞基因组
D.
又称为原癌基因
E.
以上均正确
【单选题】- Chi is a traditional Chinese unit of length. Do you know________ ? - Yes, chi is around 33.3 cm.
A.
how long a chi is
B.
what a chi is used for
C.
where a chi is from
【简答题】阅读理解。 Mary is an American schoolgirl. She is now in Beijing with her parents. She doesn't know Chinese, but she is trying to study and speak it. She often tries to speak Chinese to her Chinese frien...
【单选题】Though she didn't come back to her hometown for many years，she could still________some scenes of childhood.
A.
bring up
B.
call up
C.
turn up
D.
make up
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