[单项选择]CR的缺点（）
A. 常规X线摄影数字化
B. 图像的密度分辨力
C. X线的辐射量
D. 实现X线胶片数字化储存、再现及传输
E. 时间、空间分辨力

[简答题]简述DR系统与CR系统相比的优缺点。

[多项选择]关于CR成像优、缺点的叙述，错误的是（）
A. X线剂量比常规X线摄影降低
B. 可与原有的X线摄影设备匹配工作
C. 有后处理功能
D. 时间分辨率高
E. 空间分辨率高

[单项选择]如果在立即窗口中执行以下操作(＜CR＞是回车键)：
a=8 ＜CR＞
b=9 ＜CR＞
print a＞b＜CR＞
则输出结果是 ______。
A. -1
B. 0
C. False
D. True

[单项选择]如果在“立即”窗口中执行以下操作：
a=8＜CR＞(＜CR＞是回车键，下同)
b=9＜CR＞
Print a＜b＜CR＞
则输出的结果是 ______。
A. 1
B. 0
C. False
D. True

[单项选择]DR摄影和CR摄影相比，在哪方面不如CR（）。
A. 图像质量
B. 曝光剂量
C. 系统兼容性
D. 工作效率
E. 信噪比

[单选题]12Cr1MoV的平均含Cr量为( )。
A.12%
B.1.2%
C.0.12%
D.0.012%

[单项选择]CR的中文全称是
A. 计算机体层摄影
B. 计算机X线摄影
C. 数字摄影
D. 数字减影血管造影
E. 磁共振成像

[填空题]在Visual Basic的立即窗口内输入以下语句： X=97＜CR＞ Chr$(X)＜CR＞ 在窗口中显示的结果是______。

[多项选择]CR系统应当包括（）
A. X线发射系统
B. 成像板（IP）
C. IP读取子系统
D. 投影仪
E. 打印机

[单项选择]DR与CR相比（）
A. 曝光量小，但信噪比较差
B. 曝光量稍大，但信噪比好
C. 曝光量小，且信噪比较高
D. 曝光量稍大，且信噪比较差
E. 密度分辨率差

[单项选择]执行下面的程序时，输入abc＜CR＞(其中CR代表回车)，输出结果是( )。 #include＜stdio.h＞ #include ＜string.h＞ main（　） { char ch; while((cn=getchar（　）)!=’n’) { switch(ch-’a’) { case 0： putchar(ch+1); case 1：putchar(ch+1);break; case 2：putchar(ch+2); caSe 3：putchar(ch+2);break; } } }
A. abc
B. bbc
C. abcd
D. bbcee

[单选题]加工不锈钢1Cr13时,切削速度为1Cr18Ni9Ti的( )。
A.0.4~0.6
B.1.2~1.5
C.0.7~0.8
D.0.6~0.7

[单项选择]若运行以下程序时，从键盘输入ADescriptor＜CR＞(＜CR＞表示回车)，则下面程序的运行结果是( )。 #include＜stdio.h＞ main（　） {char c; int v0=1,v1=0,v2=0; do{ switch(c=getchar（　）) { case’a’:case’A’: case’e’:case’E’: case’i’:case’I’: case’o’:case’O’: case’u’:case’U’:v1+=1: default:v0+=1;v2+=1;} }while(c!=’/n’); printf("v0=%d,v1=%d,v2=%d/n",v0,v1,v2); }
A. v0=7,v1=4,v2=7
B. v0=8,v1=4,v2=8
C. v0=11,v1=4,v2=11
D. v0=13,v1=4,v2=12

[单项选择]

Marion Brando is the overwhehningly outstanding creative artist among contemporary American film actors. Kirk Douglas can sometimes match Brando in force, but he lacks Brando’s subtlety and pathos’; Burt Lancaster has comparable ambition but small talent. Brando begins with a good actor’s instrument -- his body. Not a huge man, he is both solid and lithe. We are, perhaps, too much aware of the basic physical effect of his chest partially covered by a torn undershirt. But, more to the point, Marlon Brando seems to carry in him a silently humming dynamo of energy, bridled and instantly ready. Whenever he moves, something seems to impend. Indisputably, there is in acting an element that is often called star quality; in Brando, it is this constant hint of possible lightning.
Actors, even more than most artists, are restricted by their personalities, but Brando strives to expand as far as possible, to use himself in playing other people rather than to bring t
A. modulate his voice as well as change his appearance for any role he may play
B. retain his own personality while playing other people
C. "become" the character he portrays
D. utilize make-up effectively