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【单选题】
关于 MySQL 中主键 约束的说法错误的是
A.
关键字为PRIMARY KEY
B.
主键的存在可以保证记录的唯一性
C.
主键属性自动为NULL
D.
主键可以设置 AUTO_INCREMENT ，将主键设置为自动增长
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参考答案：
举一反三
【单选题】—______. —That sounds good. [     ]
A.
Do you have a soccer ball?
B.
Where is my soccer ball?
C.
What's this in English?
D.
Let's play soccer.
查看完整题目与答案
【单选题】As to his criticism, I don’t mind it in the least, but______is how he does it that I can’t take.
A.
which
B.
that
C.
this
D.
it
查看完整题目与答案
【多选题】髋关节脱位的临床表现有
A.
以前脱位多见
B.
患肢缩短
C.
髋关节呈屈曲、内收、内旋畸形
D.
大转子上移
E.
患髋活动尚不受影响
查看完整题目与答案
【单选题】Chị nói tiếng Việt giỏi lắm, chị tiếng Việt bao lâu rồi?
A.
nói
B.
học
C.
viết
D.
tập
查看完整题目与答案
【单选题】I have ______ soccer here. Do you want to play ______ soccer? [     ]
A.
the ; a
B.
a ; the
C.
a; a
D.
a; /
查看完整题目与答案
【单选题】I can't tolerate being made fun of, ________ never to come again. [     ]
A.
determined
B.
being determined
C.
determine
D.
to determine
查看完整题目与答案
【单选题】I can’t remember when ______ turning point occurred exactly, but it might be ______summer morning when I was in New York.
A.
不填；a
B.
a; a
C.
the; a
D.
a; the
查看完整题目与答案
【简答题】（20分） （I）多项选择题（6分） 莽草酸是一种合成治疗甲型H1N1流感药物达菲的原料。鞣酸存在于苹果、生石榴等植物中。下列关于这两种有机物的说法不正确的是 。 A．两种酸都能与溴水反应 B．两种酸遇三氯化铁溶液都显紫色 C．鞣酸分子与莽草酸分子相比多了两个碳碳双键 D．等物质的量的两种酸与足量金属钠反应时，产生氢气的量相同 E．等物质的量的两种酸与足量氢氧化钠溶液反应时，消耗氢氧化钠的量相同 ...
查看完整题目与答案
【单选题】He likes to play _____ soccer, but I don't have any soccer balls. [     ]
A.
a
B.
this
C.
the
D.
/
查看完整题目与答案
【单选题】﹣Let’s play soccer. ﹣Good idea! Do you have __________ soccer ball?
A.
a                       
B.
an                  
C.
不填
查看完整题目与答案
相关题目：
【单选题】—______. —That sounds good. [     ]
A.
Do you have a soccer ball?
B.
Where is my soccer ball?
C.
What's this in English?
D.
Let's play soccer.
查看完整题目与答案
【单选题】As to his criticism, I don’t mind it in the least, but______is how he does it that I can’t take.
A.
which
B.
that
C.
this
D.
it
查看完整题目与答案
【多选题】髋关节脱位的临床表现有
A.
以前脱位多见
B.
患肢缩短
C.
髋关节呈屈曲、内收、内旋畸形
D.
大转子上移
E.
患髋活动尚不受影响
查看完整题目与答案
【单选题】Chị nói tiếng Việt giỏi lắm, chị tiếng Việt bao lâu rồi?
A.
nói
B.
học
C.
viết
D.
tập
查看完整题目与答案
【单选题】I have ______ soccer here. Do you want to play ______ soccer? [     ]
A.
the ; a
B.
a ; the
C.
a; a
D.
a; /
查看完整题目与答案
【单选题】I can't tolerate being made fun of, ________ never to come again. [     ]
A.
determined
B.
being determined
C.
determine
D.
to determine
查看完整题目与答案
【单选题】I can’t remember when ______ turning point occurred exactly, but it might be ______summer morning when I was in New York.
A.
不填；a
B.
a; a
C.
the; a
D.
a; the
查看完整题目与答案
【简答题】（20分） （I）多项选择题（6分） 莽草酸是一种合成治疗甲型H1N1流感药物达菲的原料。鞣酸存在于苹果、生石榴等植物中。下列关于这两种有机物的说法不正确的是 。 A．两种酸都能与溴水反应 B．两种酸遇三氯化铁溶液都显紫色 C．鞣酸分子与莽草酸分子相比多了两个碳碳双键 D．等物质的量的两种酸与足量金属钠反应时，产生氢气的量相同 E．等物质的量的两种酸与足量氢氧化钠溶液反应时，消耗氢氧化钠的量相同 ...
查看完整题目与答案
【单选题】He likes to play _____ soccer, but I don't have any soccer balls. [     ]
A.
a
B.
this
C.
the
D.
/
查看完整题目与答案
【单选题】﹣Let’s play soccer. ﹣Good idea! Do you have __________ soccer ball?
A.
a                       
B.
an                  
C.
不填
查看完整题目与答案
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