下列关于基因重组的说法不正确的是 （ ） A．生物体进行有性生殖过程中控制不同性状基因的重新组合属于基因重组 B．减数
意境不是意和境简单相加，而是意与境谐，并在此基础上生出“景外之景”、“象外之象”、“韵外之致”。例如王维《雪中芭蕉图》将夏日的芭蕉和
Their cheery song brightens many a winter's day. But robins are in danger of wearing themselves out by singing too much. Robins are singing all night一as well as during the day, British-based rese
科学家研究发现，向刚刚失去收缩功能的离体肌肉上滴葡萄糖溶液，肌肉不收缩；向同一条肌肉上滴ATP溶液，肌肉很快就发生明显的收缩。这说明（
______ green or ______ in a light green room ______ good for us. A. Wear; sleep; is B. Wearing; sleeping; are C. Wear; sleep; are D. Wearing; sleeping;
I have been learning _______ a car, and I’ve earned a lot about driving. A. how to driving B. how driving C. how to drive D. to drive
已知幂函数f(x)=x（m∈Z）为偶函数，且在区间（0，+∞）上是单调减函数. （1）求函数f(x); （2）讨论F（x）=a的奇偶性.
下列词语中加点的字，每对的读音全都相同的一组是（ ） A、稽首/无稽之谈 汤汤/赴汤蹈火 未遂/半身不遂 B、胳臂/一臂之力 纰缪/未雨
的结果是（ ）．
B. 
C. 
D. 
