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【单选题】
检索选修课程“C2”的学生中成绩最高的学生的。正确的SELECT语句是()。A.
SELECT SNO FORM. SC WHERE CNO='C2' AND GRADE >= ( SELECT GRADE FORM. SC WHERE CNO='C2' );
B.
SELECT SNO FORM. SC WHERE CNO='C2' AND GRADE IN ( SELECT GRADE FORM. SC WHERE CNO='C2' );
C.
SELECT SNO FORM. SC WHERE CNO='C2' AND GRADE NOT IN ( SELECT GRADE FORM. SC WHERE CNO='C2' );
D.
SELECT SNO FORM. SC WHERE CNO='C2' AND GRADE >= ALL ( SELECT GRADE FORM. SC WHERE CNO='C2' );
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举一反三
【单选题】指令寄存器 IR 的功能是用来 ( )
A.
存放 当前正在 执行的 一条 指令
B.
存放 将要执行的一条 指令 的 地址
C.
存放将要执行的 一条 指令
D.
存放 正在 执行的指令 的地址
【简答题】阅读一下段落完成以下题目。 Three of our classmates will have their birthdays this month. To celebrate with them, we plan to buy some gifts for each of them. Jane likes music, so we are going to buy her a CD. Terry...
【单选题】According to the passage, which of the following is true?
A.
It is very difficult for the middle-aged to live in America.
B.
America is Kids' Country because the majority of its people are young and vigorous.
C.
Kids' Country was taking shape in America when immigrants poured into the country.
D.
America is more of Kids' Country than any other countries in the world.
【单选题】Which of the following statements is NOT true?
A.
Getting off to work with a minimum effort helps save one' s energy.
B.
Dr. Kletman explains why people reach their peaks at different hours of day.
C.
Habit helps a person adapt to his own energy cycle.
D.
Children have energy cycles, too.
【单选题】Which of the following best describes the relation-ship between the McLaurin decision and the 1954 Brown v. Board of Education decision?
A.
The McLaurin decision superseded the Brown decision.
B.
The Brown decision provided a precedent for the McLaurin decision.
C.
The Brown decision reversed the McLaurin decision.
D.
The McLaurin decision limited the application of the Brown decision.
E.
The McLaurin decision provided legal authority for the Brown decision.
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