随着科学技术的发展，人们可以根据需求来改造生物的性状．如图是利用奶牛乳汁生产人类血清白蛋白的图解，据图回答问题．

（1）在此过程中涉及到某些细胞工程技术，其原理有____ ．

（2）在基因工程中，经常需要对②进行扩增，该过程需要用到的酶是____ ．基因工程的核心是____ ．检测②是否表达可以用____ 

（3）从④到⑤的过程涉及到的技术是____，把⑤送入⑥前需要对⑥进行的处理是____ ．

（4）⑦是⑥的后代，那么⑦的遗传性状和____最相似，原因是____ ．

①2017年上半年的经济效益好于2016年上半年

②2017年上半年生产成本上升幅度较大

③初次分配注重效率，再分配注重公平

④应提高劳动报酬在初次分配中的比重

若一艘轮船从上海驶往澳门，当它从长江口驶入大海时（    ）

      If people are so tired, they will fall asleep almost anywhere. We can see there are people sleeping on the bus or train on their1  home from work in the evenings. A man is2the newspaper, and seconds later it seems that he is trying to eat it. Or he will fall asleep on the shoulder of the stranger  3next to him. Another short sleep goes on in the lecture hall where a student will start snoring(打鼾) so  4  that the professor has to ask another student to shake the sleeper awake. A more embarrassing(尴尬) situation happens when a student starts falling into sleep and the weight of the head pushes(推) the arm off the  5  , and the movement carries the rest of the body along. The student wakes up on the floor with no   6  of getting there. The worst time to fall asleep is when  7  . Police reports are full of accidents that happen when people fall into sleep and go off the road. If the drivers are   8  , they will not be seriously hurt. One woman's car, for example, went into the river. She woke up in four feet of  9 and thought it was raining. When people are really   10  , nothing will stop them from falling asleep--no matter where they are.