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【简答题】
如图，点 为反比例函数 图象上一点，长方形 的面积为3，则这个反比例函数解析式为 ．
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举一反三
【单选题】一个操纵子通常含有
A.
一个启动序列和一个编码序列
B.
一个启动序列和数个编码序列
C.
数个启动序列和一个编码序列
D.
数个启动序列和数个编码序列
E.
两个启动序列和数个编码序列
【单选题】启动序列是指
A.
DNA聚合酶结合并启动转录的特异性DNA序列
B.
RNA聚合酶结合并启动转录的特异性DNA序列
C.
在-10区和-35区存在的共有序列
D.
可结合激活蛋白的特异性DNA序列
【简答题】Americans are not strangers to war. The United States was bom of the Revolutionary War (1775-1783), which freed us from British rule. We fought the British again during the War of 1812 (1812-1815). Th...
【简答题】In 1783, the British and the American made a formal peace and they signed the treaty of _____. The U.S. won its independence.
【简答题】maintain heavily regardless strive gathered accustomed attaining comply all fulfilling Fill in each of the blanks with an appropriate word. Once and for (1) , ...
【简答题】Americans are not strangers to war. The United States was born of the Revolutionary War (1775–1783), which freed us from British rule. We fought the British again during the War of 1812 (1812–1815). T...
【简答题】Fill in each of the blanks with an appropriate word. Once and for (1) , Frank decided that he was going to quit smoking. In late December, he (2) a list of goals he had tried to ach...
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