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【单选题】
在Excel中,A1、A2、A3、A4单元格类型均为数值型,A1、A2、A3、A4单元格内容分别为36、74、64、82,如果在A5单元格输入=AVERAGE(A1:A4),然后回车,则A5单元格显示的内容是(60)。
A.
=AVERAGE(K2:K5)
B.
4
C.
256
D.
64
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【单选题】有如下关系:课程表C,主键为c-id(char(4))。c-id c-name 若用如下语句建立成绩表SC: CREATE TABLE SC(s-id char(6)NOT NULL,c-id char(4)NOT NULL,score Integer),其中s-id为主键,c-id为外键(是C表的主键)。当执行如下语句时,哪个语句不能执行? ( )。
A.
INSERT SC VALUES('990101','NULL',75)
B.
INSERT SC VALUES('990203','C601',80)
C.
INSERT SC VALUES(NULL,'C602',93)
D.
INSERT SC VALUES('990202','C604',NULL)
【简答题】In 2000, the Lost City, was first discovered by accident during a ______.
【简答题】有一个数据表(TEST),字段如下: ID number PARENT_ID number NAME Varchar(20) 请使用PL/SQL来按父子层次关系查询出该表的所有数据
【单选题】有如下关系:课程表C,主键为c-id (char (4))。 若用如下语句建立成绩表SC: CREATE TABLE SC(s-id char(6)NOT NULL,c-id char(4)NOT NULL,score Inteeer), 其中s-id为主键,c-id为外键(是C表的主键)。当执行如下语句肘,( )语句不能执行。
A.
INSERT SC VALUES('990101','NULL',75)
B.
INSERT SC VALUES('990203','C601',80)
C.
INSERT SC VALUES(NULL,'C602',93)
D.
INSERT SC VALUES('990202','C604',NULL)
【单选题】Australia began to assume its modem configuration by the Eocene Epoch, some 50 million years ago, when Antarctica broke away and drifted southward.
A.
status
B.
sphere
C.
shape
D.
situation
【判断题】高粱是高产农作物,按颜色的不同,高粱可分为白黄黑红等品种,红高粱的质量为最好。
A.
正确
B.
错误
【判断题】4-1. The Bauhaus has an architecture department during the first years of its existence.
A.
正确
B.
错误
【判断题】高粱是高产农作物,按颜色的不同,高粱可分为白、黄、黑、红品种,红高粱红高粱的质量为最高
A.
正确
B.
错误
【判断题】During the reign of the Liberal Party (1896~1911), Canada experienced its first economic depression.
A.
正确
B.
错误
【单选题】What is the reason for much more damage over the next 20 years than during the last 20 years?
A.
Hurricane activity is more or less readjusting to its long-term averages after a period of relative quiet.
B.
More people are placing themselves, their houses, yachts, and office high-rises in storm paths when they move to hurricane-prone states and their geologically fragile shorelines.
C.
The Atlantic basin is in the midst of a long-term active phase for hurricanes.
D.
The unusually high amount of storm activity can not be anticipated.
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