爵位、爵号,是古代天子或皇帝对贵戚功臣的封赐,春秋时期各诸侯国王的爵位不尽相同,下列爵位最低的是 [ ]
A.齐侯
B.郑伯
C.楚子
D.宋公
答案:C
阅读理解。
I'm Mary. I'm an English girl. My age is twelve. I was born (出生) on May 17th , 1991. I learn
Chinese at Beijing No.3 Middle School. I have a good friend. Her name is Lucy. She is twelve, too. We
are in the same (同样的) grade (年级). But we are not in the same class. I'm in Class Two, and she is in
Class Three. We have the same Chinese teacher (教师). Her name is ZhaoYing. We all like her. Lucy's
father teaches English in China, Lucy's mother teaches us English . And she has a sister. Her name is Lily.
She is only a year- five -old girl.
1. Who has a sister?
A. I don't know
B. Mary
C. Chinese teacher
D. Lucy
2. Mary and Lucy are _____.
A. classmates
B. sisters
C. brothers
D. friends
3. Lucy was born _____.
A. on May 17th , 1990
B. on May 17th ,1991
C. Sorry, I don't know.
D. in May 17th, 1990
4. Mary and Lucy have the same _____.
A. grade
B. Class
C. age
D. A and C
5. Now Lucy's parents are in _____, They teach _____.
A. England, English
B. China, English
C. England, Chinese
D. China, Chinese
某计算机系统中有一个CPU、一台扫描仪和一台打印机。现有3个图像任务,每个任务有3个程序段:扫描Si,图像处理Ci和打印Pi(i=1,2,3)。如图所示为3个任务各程序段并发执行的前驱图,其中, (7) 可并行执行, (8) 的直接制约, (9) 的间接制约。
A.S1受到S2和S3、C1受到C2和C3、P1受到P2和P3 B.S2和S3受到S1、C2和C3受到C1、P2和P3受到P1 C.C1和P1受到S1、C2和P2受到S2、C3和P3受到S3 D.C1和S1受到P1、C2和S2受到P2、C3和S3受到P3