若a,b,c1,c2,x,y均是整型变量,正确的switch语句是______。
A. switch(a+b); {case 1:y=a+b;break; case 0:y=a-b;break; }
B. switch(a*a+b*b) {case 3; case 1:y=a+b;break; case 3:y=b-a;break; }
C. switch a {case c1:y=a-b;break; case c2;x=a*b;break; default:x=a+b; }
D. switch(a-b) {default:y=a*b;break; case 3:case 4:x=a+b;break; case 10:case11:y=a-b;break; }
听力原文:W What led you to open the Cincinnati Glass Center?
M Well, people know about Cincinnati's history as a steel manufacturing center for North America, but not many people know that the town used to be a center of the glass industry as well. We wanted to awaken people to that part of Cincinnati's past.
W What would you say has been your proudest achievement since you opened the museum?
M Since we opened the center, several prominent glass artists have moved here, artists from all over the world. I'm proud that we've attracted so many glass artists to the city.
What is being discussed?
A museum
B. A library
C. An art school
D. An art gallery
以许可的性质为标准,行政许可分为()。
A. 行为许可和资格许可
B. 独立的许可和附文件的许可
C. 权利性许可和附义务的许可
D. 排他性许可和非排他性许可
颁发履约证书后的第()内,承包商应向工程师提交最终报表草案,以及工程师要求的有关资料。
A. 28天
B. 56天
C. 84天
D. 112天