单项选择题

A．are nothing more than any other substances because th……

The author thinks that the biologists who engineer genes into plants ______ .

A．are nothing more than any other substances because they are made of molecule too
B．pay special attention to living things and their relation to their environment
C．insert the genes of one species among the genes of another and test the environment consequences
D．modify the genes of our food crops without considering the influence on the whole organism

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热门试题

单项选择题Helicopter parents means ______.

A．parents who tend to overdramatize small incidents
B．parents who can' t put things in perspective
C．parents who are otherwise exceedingly rational people can become irrational when it comes to their children
D．parents who are too protective

单项选择题According to the passage, why should parents listen respectfully to each child' s idea even if he has some rather bizarre or violent suggestions

A．Because it makes the child creative.
B．Because it' s acceptable given that he is young.
C．Because the child should be permitted to explore his own world.
D．Because it makes parents gentler approaches more acceptable.

单项选择题Parents should ______ on their child' s first day at school.

A．foresee all the problems the child would encounter and arrange all the things for him/her
B．supervise their child all day
C．pace up and down the room to ease their nervousness
D．show their faith that their child can cope with the new situation

单项选择题If parents take an attitude of benign neglect, they ______.

A．left their children to their own devices if they get into trouble
B．jump in to solve all their children' s problems
C．keep a watchful eye on their children but don' t interfere in their affairs only when they are needed
D．are indifferent to their children' s trouble

单项选择题What's the meaning of crossed laterality

A．The right hand is controlled by the left side of the brain, and the left hand is controlled by the right side of the brain.
B．Right-handers' speech-language center is in brain' s left-hemisphere, while left-handers' speech-language center is in brain's right-hemisphere.
C．The development of right and left side of brain is interactive.
D．The human central nervous system is just like a circuit.