面对网络谣言，中学生应该（    ）

①抵制不良言论，辨别是非真假

②履行公民义务，不信谣不传谣

③行使公民权利，向有关部门举报

④作为个人谈资，适当私下传播

如图表示人类“治疗性克隆”的大概过程，请据图回答：

（1）人类“治疗性克隆”属于生物工程中的____ 工程，它是一种____ 水平的操作．

（2）科学家将患者的体细胞的核植入去核的卵细胞，而不直接用体细胞进行培养的原因是：____ 

（3）你认为“治疗性克隆”有什么意义？（答出两点）____，____ ．

（4）胚胎干细胞若作为培育转基因动物的受体细胞被移入囊胚中，胚胎将发育成只有部分细胞含有目的基因的“嵌合体”．这种嵌合体的后代仍然会含有目的基因吗？____ ．原因是____ ．

（5）在胚胎工程中，可以利用连续胚胎细胞核移植的方式培育动物，该技术的优点是____ 

函数$y={\sin }^2\left(\frac{\mathrm{\pi }}{4}+x\right)-{\sin }^2\left(\frac{\mathrm{\pi }}{4}-x\right)$的值域是（   ）

阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

    My mom is very important to me. She was 40 years old ____ I was born. She takes good care of me.

    She did so many things for me ____ my elementary school years. When I was a child, she liked to prepare the ____ (delicious) food for each dinner everyday.

    ____, my mom was the one who often beat me. I always cried ____ (loud) to let the neighbours think she ____ (kill) me. For example, if she acted as though she was about to raise her hand to me, I would often open my ____ and let the world know about it. ____ anybody was passing by out on the road, she would either change her mind ____ just give me a few light touches. So early in life, I had learned that if you want something, you ____ make some noises.