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【单选题】
下列有关真核生物结构基因的说法不正确的是A.
结构基因大多是断裂基因
B.
产物多为单顺反子RNA
C.
含有大量的重复序列
D.
编码基因比非编码基因多
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举一反三
【单选题】He has _ for ten years. Ten years __________ a long time to him. [ ]
A.
left home; are
B.
left home; is
C.
been away from home; is
D.
been away from home; are
【简答题】動詞を分類するにはどういう分類方法がありますか
【单选题】They are well______ with each other since they once studied in the same university.
A.
recognized
B.
accustomed
C.
informed
D.
acquainted
【单选题】下列关于SQL的说法中,正确的是________
A.
SQL是过程化语言
B.
SQL只有一种使用环境
C.
所有用SQL编写的语句都是可移植的
D.
SQL最早由微软公司开发
【单选题】As a famous leader of human rights movement, Martin Luther King detested injustice.
A.
recognized
B.
suffered
C.
confronted
D.
hated
【简答题】完形填空。 We are going to take a test today. It will show if we are 1 to get in an honours class next year. But, I don't think it is 2 for me. It is the maths part-my favourite. We take the test by comput...
【单选题】以下关于ROM的描述错误的是（）
A.
ROM是一种易失存储器
B.
ROM在工作时，只能进行读出操作，而不能进行写入操作
C.
ROM的存储单元是一些开关元件
D.
EEPROM的擦除方式是电擦除
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