问题 单项选择题 共用题干题

牙防所张老师带助理执业医师实习组到某小学开展窝沟封闭防龋措施,在临床操作过程中,对于每个操作环节容易出现的问题,张老师都予以分析和纠正。

涂布封闭剂时注意不要产生()

A.调拌均匀

B.覆盖全部酸蚀面

C.涂布均匀

D.窝沟内气泡

E.固化良好

答案

参考答案:D

单项选择题
单项选择题

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.

What does "the uninitiated" mean

A. People who visit animals in urban zoos.
B. People who do not like animals of the wild.
C. People who know little about a certain topic.
D. People who do not visit zoos every year.