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【单选题】
下面哪一个判断列是NULL值的语法是正确的（   ）。
A.
列名=0
B.
列名=’’
C.
列名 IS EMPTY
D.
列名 IS NULL
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举一反三
【单选题】Which of the following is the first step of the bypass operation?
A.
Thread up through the aorta to the top of the diseased artery.
B.
Push a needle through artery wall into the adjacent vein.
C.
Put a special catheter into one of the leg arteries.
D.
Block off the vein to allow blood to re-routed.
查看完整题目与答案
【单选题】According to the passage, through which of the following does the energy released in the Sun pass be fore it becomes light?
A.
The x-ray part of the spectrum.
B.
Electromagnetic space.
C.
The solar surface.
D.
Interplanetory space.
查看完整题目与答案
【单选题】某污水处理建设项目需采购一批设备 ， 按照规定必须进行招标采购的的标准是单项合同估算价在
A.
48 ． 某污水处理建设项目需采购一批设备 ， 按照规定必须进行招标采购的的标准是单项合同估算价在（ ）万元人民币以上。 A ． 50
B.
． 100
C.
． 150
D.
． 200
查看完整题目与答案
【单选题】席子的加工采用了三原组织中的哪一种?
A.
斜纹
B.
平纹
C.
缎纹
D.
双层
查看完整题目与答案
【单选题】Which of the following is true of the tubular fluid that passes through the lumen of the early distal tubule in the region of the macula densa?
A.
It is usually hypotonic
B.
It is usually isotonic
C.
It is usually hypertonic
D.
It is hypertonic in antidiuresis
E.
It is hypertonic when the filtration rate of its own nephron decreases to 50% below normal
查看完整题目与答案
【单选题】Which of the following forms of energy is demonstrated through the process of combustion?
A.
Chemical energy
B.
Mechanical energy
C.
Thermal energy
D.
Electrical energy
查看完整题目与答案
【单选题】Through which of the following can't unhappiness come according to the author?
A.
Fear.
B.
Vain.
C.
Unlimited desires.
D.
Natural desires.
查看完整题目与答案
【单选题】某污水处理建设项目需采购一批设备，按照规定必须进行招标采购的标准是单项合同估算价在( )万元人民币以上。
A.
50
B.
100
C.
150
D.
200
查看完整题目与答案
【判断题】因为企业建账时勾选了“有无外币核算”,所以在基础档案中要设置外币。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following is true of the tubular fluid that passes through the lumen of the early distal tubule in the region of the macula densa?
A.
It is usually isotonic
B.
It is usually hypotonic
C.
It is usually hypertonic
D.
It is hypertonic in antidiuresis
E.
It is hypertonic when the filtration rate of its own nephron decreases to 50% below normal
查看完整题目与答案
相关题目：
【单选题】Which of the following is the first step of the bypass operation?
A.
Thread up through the aorta to the top of the diseased artery.
B.
Push a needle through artery wall into the adjacent vein.
C.
Put a special catheter into one of the leg arteries.
D.
Block off the vein to allow blood to re-routed.
查看完整题目与答案
【单选题】According to the passage, through which of the following does the energy released in the Sun pass be fore it becomes light?
A.
The x-ray part of the spectrum.
B.
Electromagnetic space.
C.
The solar surface.
D.
Interplanetory space.
查看完整题目与答案
【单选题】某污水处理建设项目需采购一批设备 ， 按照规定必须进行招标采购的的标准是单项合同估算价在
A.
48 ． 某污水处理建设项目需采购一批设备 ， 按照规定必须进行招标采购的的标准是单项合同估算价在（ ）万元人民币以上。 A ． 50
B.
． 100
C.
． 150
D.
． 200
查看完整题目与答案
【单选题】席子的加工采用了三原组织中的哪一种?
A.
斜纹
B.
平纹
C.
缎纹
D.
双层
查看完整题目与答案
【单选题】Which of the following is true of the tubular fluid that passes through the lumen of the early distal tubule in the region of the macula densa?
A.
It is usually hypotonic
B.
It is usually isotonic
C.
It is usually hypertonic
D.
It is hypertonic in antidiuresis
E.
It is hypertonic when the filtration rate of its own nephron decreases to 50% below normal
查看完整题目与答案
【单选题】Which of the following forms of energy is demonstrated through the process of combustion?
A.
Chemical energy
B.
Mechanical energy
C.
Thermal energy
D.
Electrical energy
查看完整题目与答案
【单选题】Through which of the following can't unhappiness come according to the author?
A.
Fear.
B.
Vain.
C.
Unlimited desires.
D.
Natural desires.
查看完整题目与答案
【单选题】某污水处理建设项目需采购一批设备，按照规定必须进行招标采购的标准是单项合同估算价在( )万元人民币以上。
A.
50
B.
100
C.
150
D.
200
查看完整题目与答案
【判断题】因为企业建账时勾选了“有无外币核算”,所以在基础档案中要设置外币。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following is true of the tubular fluid that passes through the lumen of the early distal tubule in the region of the macula densa?
A.
It is usually isotonic
B.
It is usually hypotonic
C.
It is usually hypertonic
D.
It is hypertonic in antidiuresis
E.
It is hypertonic when the filtration rate of its own nephron decreases to 50% below normal
查看完整题目与答案