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【简答题】
当晶体二极管导通后,硅二极管的正向压降为 V,锗二极管的正向压降为 V。
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【单选题】近代中国社会的主要矛盾是:
A.
资本主义与帝国主义之间的矛盾
B.
帝国主义与中华民族之间的矛盾、封建主义与人民大众之间的矛盾
C.
地主与农民之间的矛盾
D.
资产阶级与无产阶级的矛盾
【简答题】Tom didn’t take part in the after -school activity yesterday. ( 改为反意疑问句 Tom didn’t take part in the after -school activity yesterday, _________ _________?
【单选题】Suppose relation R(A,C) has the following tuples: A C 3 4 6 4 2 3 3 5 7 1 and relation S(B,C,D) has the following tuples: B C D 5 1 6 1 5 8 4 4 9 Compute the natural join of R and S. Which of the foll...
A.
(6, 4, 3, 9)
B.
(3, 4, 3, 9)
C.
(7, 5, 1, 6)
D.
(3, 4, 3, 9)
【简答题】(一)AS企业系上市公司,按年对外提供财务报表。 ( 1)2016年3月6日AS公司以赚取差价为目的从二级市场购入一批X公司发行的股票100万股。取得时公允价值为每股为5.2元,含已宣告但尚未发放的现金股利为每股0.2元,另支付交易费用5万元,全部价款以银行存款支付。AS公司根据其管理该证券的业务模式和其合同现金流量特征,将该证券分类为以公允价值计量且其变动计入当期损益的金融资产。 ( 2)201...
【单选题】Suppose relation R(A,B) has the following tuples: A B 1 2 1 5 5 6 and relation S(B,C,D) has the following tuples: B C D 2 4 6 6 6 8 5 7 9 Compute the natural join of R and S. Which of the following tu...
A.
(1,2,6,8)
B.
(3,4,7,8)
C.
(1,6,6,8)
D.
(1,5,7,9)
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 7 8 4 5 6 2 5 3 1 2 6 and relation S(A,B,C) has the following tuples: A B C 2 5 3 6 1 4 4 5 6 1 2 3 Compute (R - S) union (S - R), oft...
A.
(4,7,8)
B.
(4,5,3)
C.
(1,5,6)
D.
(1,2,3)
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 4 5 4 5 6 2 5 3 1 2 6 and relation S(A,B,C) has the following tuples: A B C 2 5 3 6 1 4 4 5 6 1 2 3 Compute (R - S) union (S - R), oft...
A.
(4,4,5)
B.
(2,5,3)
C.
(4,5,6)
D.
(1,2,3)
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