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下列说法中正确的是，感应电动势的大小  (       )

A．跟穿过闭合电路的磁通量变化率成正比

B．跟穿过闭合电路的磁通量的变化大小有关系

C．跟穿过闭合电路的磁通量的变化快慢有关系

D．跟电路的电阻大小有关系

常用的抗甲状腺药物是

A．胰岛素绝对不足
B．大量甲状腺素突然释放入血
C．呼出的气体带烂苹果味
D．甲状腺肿大、震颤、有杂音
E．饥饿感，心慌手颤

One is never too old to learn. Life learning (sometimes called un-schooling or self-directed learning) is one of those concepts that are almost easier to explain by saying what it isn’t than what it is. And that’s probably because our own schooled backgrounds have convinced us that learning happens only in a fine building on certain days, between certain hours, and managed by a specially trained professional.

Within that schooling framestudy, no matter how hard teachers try and no matter how good their textbooks, many bright students get bored, many slower students struggle and give up or lose their self-respect, and most of them reach the end of the process unprepared to enter into society. They have memorized a certain body of knowledge long enough to rush back the information on tests, but they haven’t really learnt much, at least of the official curriculum.

Life learners, on the other hand, know that learning is not difficult, that people learn things quite easily if they’re not compelled and forced, if they see a need to learn something, and if they are trusted and respected enough to learn it on their own timetable, at their own speed, in their own way—no matter what age and no matter whether we’re at school or at home.

Life learning is independent of time, location or the presence of teacher. It does not require mom or dad to teach, or kids to work in workbooks at the table from 9 to noon. Life learning is learner-driven. It involves living and learning—in and from the real world. It is about exploring, questioning, experimenting, making messes, taking risks without fear of making mistakes, being laughed at and trying again.

Furthermore, life learning is about trusting kids to learn what they need to know and about helping them to learn and grow in their own ways. It is about providing positive experiences that enable children to understand the world and their culture and to interact with it.

小题1:It is implied in the text that it is hard to ______.

A．tell the nature of life learning 　　

B．carry life learning through

C．learn without going to school 　　

D．find a specially trained teacher小题2:According to the author, the schooling framestudy often ______.

A．produces slow students with poor memories

B．ignores some parts of the official curriculum

C．fails to provide enough knowledge about life

D．gives little care to the quality of teaching materials小题3:Life learners recognize that learning will not be difficult if they are ______.

A．able to respect other people　

B．careful to make a time table

C．clear about why to learn　　

D．cautious about any mistakes小题4:According to the author, life learning ______.

A．could prevent one from running risks

B．teaches a kid how to avoid being laughed at

C．makes a kid independent of his parents

D．could be a road full of trials and errors小题5:Through life learning, children ______.

A．will grow without the assistance from parents

B．will be seperated from the negative side of society

C．will be driven to learn necessary life knowledge

D．will learn to communicate with the real society

有关颈内静脉的描述，错误的是（）

A.颈部最大的静脉干

B.上端续于乙状窦

C.与锁骨下静脉汇合成头臂静脉

D.属支有颅内支、颅外支两种

E.以上均错误

右图是DNA的分子结构模式图，请据图回答：

DNA分子复制发生的时间是（）和（）。