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【单选题】
看到课件后，了解单反相机的成像原理。请问单反相机中最核心的部件是什么？最区别于手机和数码卡片机的部件是什么？A.
感光元件
B.
反光板
C.
五棱镜
D.
对焦屏
手机使用
分享
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反馈参考答案：
举一反三
【单选题】The passage states that ______.
A.
laziness is a disease
B.
some people appear lazy because they are insecure
C.
laziness is more beneficial than harmful
D.
a good definition of laziness is emotional illness
【简答题】The s ______ in this shop is always slow; the girls are very lazy.
【简答题】A．Because it is bad for their health. B．Because those people are lazy. C．Because those people maintain good habits. D．Because those measures haven't changed people's bad habits permanently.
【单选题】在内存的动态分区分配中,当进程运行完毕释放内存时,系统会回收内存。当回收区与插入点的前一个空闲分区相邻时,应该:
A.
将回收区与插入点后的分区合并，不必为回收区分配新表项，，只需修改后一分区的大小。
B.
将回收区与插入点前的分区合并，不必为回收区分配新表项，只需修改前一分区的大小。
C.
为回收区单独建立一个新表项，填写回收区的首址和大小，插入空闲区表中。
D.
将回收区与插入点前的分区和插入点后的分区一起合并。
【单选题】In the eyes of the society, ______.
A.
the poor tend to symbolize what lazy and evil people mm out to be
B.
the poor are not worthy of the sympathy the society shows them
C.
economic prejudice is more of an obstacle to the solution of poverty
D.
the non-poor should show more sympathy for the poor
【单选题】Every host and router on the Intemet has an IP address, which encodes its
A.
host number
B.
host number and socket
C.
network number
D.
host number and network number
【简答题】列一元二次方程解应用题：沂水联华超市服装柜在销售中发现：进货价为每件50元，销售价为每件90元的某品牌童装平均每天可售出20件．为了迎接“六一”国际儿童节，商场决定采取适当的降价措施，扩大销售量，增加盈利．经市场调查发现：如果每件童装降价1元，那么平均每天就可多售出2件，要想平均每天销售这种童装盈利1200元，同时又要使顾客得到较多的实惠，那么每件童装应降价多少元？
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