皮皮学，免费搜题
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搜题
【单选题】
按检索方法来分类，常见的搜索引擎有全文索引类和（）A.
关键词索引
B.
目录索引类
C.
自动索引类
D.
网页索引类
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Remember, e-mail is not designed for immediate response; it’s designed for _______.
【单选题】—Could you tell me someexamination skills? —Sure. In the exam, the _______you are, the_______ mistakes you’ll make.
A.
carefully ; little
B.
more carefully; fewest
C.
more careful; fewer
D.
more careful; less
【单选题】有学生表S、课程表C和选课表SC，结构分别如下：s(学号, 姓名, 性别, 年龄)c(课程号, 课程名, 学分)sc(学号, 课程号, 成绩)检索学号姓名和学生所修课程的课程名和成绩，正确的SQL命令是______。
A.
SELECT 学号, 姓名, 课程名, 成绩 FROM s, c, sc WHERE s.学号=sc.学号 AND sc.学号=c.学号
B.
SELECT 学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc ON s.学号=sc.学号 INNER JOIN c ON sc.课程号=c.课程号
C.
SELECT s.学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc INNER JOIN c ON s.学号=sc.学号 ON sc.课程号=c.课程号
D.
SELECT s.学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc ON s.学号=sc.学号 INNER JOIN c ON sc.课程号=c.课程号
【单选题】有学生表s、课程表c和选课表sc，结构分别如下：s(学号, 姓名, 性别, 年龄)c(课程号, 课程名, 学分)sc(学号, 课程号, 成绩)检索学号姓名和学生所修课程的课程名和成绩，正确的SQL命令是______。
A.
SELECT s.学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc ON s.学号=sc.学号 INNER JOIN c ON sc.课程号=c.课程号
B.
SELECT 学号, 姓名, 课程名, 成绩 FROM s, c, sc WHERE s.学号=sc.学号 AND sc.学号=c.学号
C.
SELECT 学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc ON s.学号=sc.学号 INNER JOIN c ON sc.课程号=c.课程号
D.
SELECT s.学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc INNER JOIN c ON s.学号=sc.学号 ON sc.课程号=c.课程号
【单选题】Remember, e-mail is not designed for immediate response; it's designed for _____.
A.
notification
B.
report
C.
convenience
D.
change
【单选题】有学生表s、课程表c和选课表sc，结构分别如下：s(学号, 姓名, 性别, 年龄)c(课程号, 课程名, 学分)sc(学号, 课程号, 成绩)检索学号姓名和学生所修课程的课程名和成绩，正确的SQL命令是______。
A.
SELECT 学号, 姓名, 课程名, 成绩 FROM s, c, sc WHERE s.学号=sc.学号 AND sc.学号=c.学号
B.
SELECT 学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc ON s.学号=sc.学号 INNER JOIN c ON sc.课程号=c.课程号
C.
SELECT s.学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc INNER JOIN c ON s.学号=sc.学号 ON sc.课程号=c.课程号
D.
SELECT s.学号, 姓名, 课程名, 成绩 FROM s INNER JOIN sc ON s.学号=sc.学号 INNER JOIN c ON sc.课程号=c.课程号
【简答题】The more careful you are, the fewer _______ (mistake) you’ll make.
【单选题】Aristotle could have avoided the mistake of thinking that women have fewer teeth than men _____ his wife to keep her mouth open while he counted her teeth.
A.
if he asked
B.
when he was asking
C.
should he ask
D.
had he asked
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