Java语言有自动收集垃圾功能，周期性的回收一些长期不用的对象占用的内存。下列哪些是

Dear Zhou Lan,

Thank you very much for your mail. I want to go to China. I know something about China from your e-mails. Your English is very good. But I don't know much Chinese. Now I'm learning it from my parents. They know much about China. They tell me many things about China.

I'm happy to know you like your school and your family. You want to know my family and my school. I have a big family. My grandparents and my parents are all very fine. My father has a brother. He is my uncle, John. He and my aunt have their children. They're Bill, Linda, Mary and Lily. My brother Dick is a boy of eighteen. I like my family very much. I'll go to China next year with my mother. She is going to teach English in a middle school in Beijing.

Yours,

Annie

小题1:This is an e-mail from _____ to _____.

A．Zhou Lan; Annie

B．Annie; Zhou Lan's family

C．Zhou Lan; Annie's family

D．Annie; Zhou Lan小题2:How old is Dick?

A．17

B．18

C．19

D．20小题3:How many people are there in Annie's big family?

A．4

B．6

C．12

D．14小题4:Who will come to China?

A．Annie

B．Annie's family

C．Annie and her mother

D．Annie's parents小题5:Who teaches Annie Chinese? (   )

A．Zhou Lan.

B．Annie's parents

C．Annie's grandparents

D．Annie herself

平面镜成像的特点：

像与物大小_____  _；像到平面镜的距离与物体到平面镜的距离                ；像与物体的连线与平面镜垂直且平分；像与物左右              （填“相反”或“相同”）。

以下程序的输出结果是( )。 #include ＜stdio.h＞ main() { int i;for(i=1;i＜5;i++){ if(i%2) printf("*"); else continue; printf("#");}printf("$\n");

A．*#*#*#$

B．#*#*#*$

C．*#*#$

D．#*#*$

DIC患者出血与下列哪一项因素关系最为密切（）

A.凝血因子合成减少

B.凝血因子激活障碍

C.凝血因子大量消耗

D.抗凝物质增多

E.血管壁通透性升高

双燃料发动机框架结构热交换器将润滑油流经发动机获得的热量传递给（）。