( )是我国制定社会主义法律的根本原则。A．四项基本原则 B．原则性与灵活性相结合的

选择适宜的( )是生态恢复的关键技术之一。

A．植物数量

B．植物种类

C．动物种类

D．动物数量

Now which are the animals really to be pitied in captivity First, those clever beings whose lively urge for activity can find no outlet behind the bars of the cage. This is most conspicuous, even for the uninitiated, in the case of animals which, when living in a free state, are accustomed to roaming about widely. Owing to this frustrated desire, foxes and wolves housed, in many old-fashioned zoos, in cages which are far too small, are among the most pitiable of all caged animals.
Though pinioned swans generally seem happy, under proper care, by hatching and rearing their young without any trouble, at migration time things become different: they repeatedly swim to the lee side of the pond, in order to have the whole extent of its surface at their disposal, trying to take off. Again and again the grand preparations end in a pathetic flutter of their half wings ; a truly sorry picture !
This, however, rarely awakens the pity of the zoo visitor, least of all when such an originally highly intelligent and mentally alert animal has deteriorated, in confinement, into a crazy idiot, a very caricature of its former self. Sentimental old ladies, the fanatical sponsors of the societies for Prevention of Cruelty to Animals, have no compunction in keeping a grey parrot in a relatively small cage or even chained to a perch. Together with the large corvines, the parrots are probably the only birds which suffer from that state of mind, common to prisoners, namely, boredom.

Which is the "lee side" of the pond

A．The side the wind is blowing from.

B．The side which is sheltered from a storm.

C．The side the wind is blowing towards.

D．The side where the water is the deepest.

自我的实现可以完全由个人完成，与他人与社会无关。

市净率越小，则说明股价处于较高水平。( )

防汛抢险设施及物料按照（）常备、社会团体和群众筹集的方式储备。

A.国家

B.集体

C.个人

D.企业