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")
We've decided to turn one of the offices in the building into a nursery and will spend the last week of June ______ it.
A. (A) to refurnish
B. (B) refurnish
C. (C) refurnished
D. (D) refurnishing
For many middle-aged people, when it comes to ______ for retirement, they are not quite sure about how much money they should save and spend.
A. (A) prepare
B. (B) preparing
C. (C) prepared
D. (D) prepares
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