问题
单项选择题
保证网络安全的最主要因素是（）。
A.拥有最新的防毒防黑软件
B.使用高档机器
C.使用者的计算机安全素养
D.安装多层防火墙
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
保证网络安全的最主要因素是（）。
A.拥有最新的防毒防黑软件
B.使用高档机器
C.使用者的计算机安全素养
D.安装多层防火墙
参考答案：C
| 完型填空。 | |||
| Mark Twain, the famous writer and speaker, liked to play jokes on others But once a joke was played 1 him. One day, Mark Twain gave a lecture in a small town. At lunch a young man told him that his uncle 2 laughed. Nobody and nothing could make his uncle 3 . But Mark Twian said he was ___4___ he could make him laugh. He asked the young man to 5 his uncle to his house. That evening Mark Twain told some 6 stories. Everyone one laughed, 7 the old man never even smiled. Mark Twain told funniest stories, but the old man did not laugh, 8 . At last, he stopped. He was very tired. Some days later, Mark Twain told a friendof ___9___ about this story, His friend laughed and said that he knew that old man. He was 10 . | |||
| ( )1. A. at ( )2. A. always ( )3. A. laugh ( )4. A. afraid ( )5. A. leave ( )6. A. unhappy ( )7. A. so ( )8. A. too ( )9. A. theirs ( )10. A. deaf | B. on B. somethings B. cry B. sorry B. carry B. terrible B. but B. either B. mine B. blind | C. with C. often C. speak C. sure C. bring C. sad C. and C. also C. his C. alseep | D. in D. never D. read D. happy D. take D. interesting D. or D. already D. dead D. dead |