检索学生姓名及其所选修课程的课程号和成绩。正确的SELECT语句是______。
A. SELECT S．SN，SC．C#，SC．CRADE
B. FROMS
C. WHERE S．S#=SC．S#
D. SELCECT S．SN，SC．C#，SC．GRADE
E. FROM SC
F. WHERE S．S#=SC．CRADE
G. SELECT S．SN，SC．C#，SC．CRADE
H. FROM S，SC
I. WHERE S．S#：SC．S#
J. ) SELSECT S．SN，SC．C#，SC．
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Due to the rising costs, starting July, the yearly ______ to this sports magazine will increase from $100 to $120.
A. (A) subscription
B. (B) description
C. (C) prescription
D. (D) inscription
计算机病毒极强的再生和扩散特性称为病毒的
A. 隐蔽性
B. 潜伏性
C. 传播性
D. 激发性
E. 破坏性
Research into the material culture of a nation is of great importance because ______.
A. it helps produce new cultural tools and technol0g~,
B. it can reflect' the development of the nation
C. it helps understand the nation's past and present
D. it can demonstrate the nation's civilization
检索选修课程"C2"的学生中成绩最高的学生的学号。正确的SELECT的语句是______。
A. SELECT S# FORM SC
B. WHERE C#="C2" AND GRADE> =(SELECT GRADE FORM SC)
C. WHERE C#="C2")
D. SELECT S#FORM SC
E. WHERE C#="C2" AND GRADE IN(SELECT CRADE FORM SC)
F. WHERE C#="C2"
G. SELECT S# FORM SC
H. WHERE C#="C2" AND GRADE NOT IN(SELECT GRADE FORM SC
I. WHERE C#="C2"
J. SELECT S# FORM SC
K. WHERE C#="C2" AND CRANDE> =ALL(SELECT GRADE FORM SC
L. WHERE C#="C2")
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