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完形填空。 I have been blessed with the opportunity in my life. It took the near-death experience of my dad to make me realize that my purpose in life is to 1 others. My dad suffered from leukemia (白血病) in 1998. 2 the pain and treatment that he endured inspired me to be a more kind and 3 person. I realized life is just too 4 and it was time for me to make some changes-do the things in life that I wanted to do without making 5 why I couldn't do them. My dad 6 a bone marrow transplant (骨髓移植) operation, and after that he was able to reuse his own 'cleaned' marrow, so a donor (捐献者) was not needed. That was excellent 7 because donors who are a match are hard to come by. That 8 me to become a bone marrow donor and hopefully help someone else one day. I also 9 money for the cancer patients. Yet, I was not satisfied with just that. I had to do more, I 10 blood every other month and seek opportunities to do other acts of kindness daily. The opportunity, some days, presents itself very 11 and some days I have to seek it out. Either way, it comes. I would like to 12 one of my favorite quotes with you all. 'In an average lifetime, a person 13 about sixty-five thousand miles. That's two and half times around the world I wonder 14 your steps will take you. I wonder how you'll use the rest of the 15 you're given.' I want to use my miles to create foot prints of love in this world. (     )1. A. advise (     )2. A. Suffering (     )3. A. stronger (     )4. A. short (     )5. A. efforts (     )6. A. refused (     )7. A. expression (     )8. A. forced (     )9. A. raised (     )10. A. check (     )11. A. secretly (     )12. A. share (     )13. A. conveys (     )14. A. where (     )15. A. materials B. ask B. Watching B. independent B. wonderful B. promises B. had B. knowledge B. inspired B. kept B. test B. clearly B. divide B. owns B. why B. miles C. help C. Discovering C. giving C. dangerous C. excuses C. learned C. news C. allowed C. paid C. donate C. peacefully C. record C. measures C. when C. world D. understand D. Bringing D. receiving D. boring D. plans D. stopped D. sense D. expected D. hid D. sell D. wildly D. repeat D. walks D. if D. wealth
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【判断题】电路中任意两个节点之间连接的电路称为支路。
A.
正确
B.
错误
【简答题】批处理系统的主要优点是①和②;主要缺点是③和④。
【单选题】下列说法正确的是( )。I,批处理的主要缺点是需要大量内存II,当计算机提了核心态和用户态时,输入/输出指令必须在核心态下执行ⅡI,操作系统中采用多道程序设计技术的最主要原因是为了提高CPU和外部设备的可靠性Ⅳ,操作系统中,通道技术是一种硬件技术
A.
I、II
B.
I、III
C.
II、Ⅳ
D.
II、ⅡI、Ⅳ
【判断题】穿过高斯面的D通量仅与面内自由电荷有关,而穿过高斯面的E通量与高斯面内自由电荷和束缚电荷均有关。
A.
正确
B.
错误
【判断题】电路中任意两个节点之间连接的无分支电路称之为支路。
A.
正确
B.
错误
【单选题】下列说法正确的是( )。 I.批处理的主要缺点是需要大量内存 II.当计算机提供了核心态和用户态时,输入/输出指令必须在核心态下执行 III.操作系统中采用多道程序设计技术的最主要原因是为了提高CPU和外部设备的可靠性 IV.操作系统中,通道技术是一种硬件技术
A.
I、II
B.
I、III
C.
II、IV
D.
II、III、IV
【判断题】电路中任意两个节点之间连接的电路统称为支路。
A.
正确
B.
错误
【判断题】电路中任意两个节点之间连接的电路统称为支路。 ____
A.
正确
B.
错误
【单选题】下列说法正确的是( ) I.批处理的主要缺点是需要大量内存 II.当计算机提供了核心态和用户态时,输入/输出指令必须在核心态下执行 III.操作系统中采用多道程序设计技术的最主要原因是为了提高CPU和外部设备的可靠性 IV.操作系统中,通道技术是一种硬件技术
A.
Ⅰ、Ⅱ
B.
Ⅰ、Ⅲ
C.
Ⅱ、Ⅳ
D.
Ⅱ、Ⅲ、Ⅳ
【单选题】批处理系统的主要缺点是
A.
系统吞吐量小
B.
CPU利用率不高
C.
资源利用率低
D.
无交互能力
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