皮皮学，免费搜题
登录
搜题
【单选题】
血液中CO2的主要运输形式是
A.
物理溶解
B.
氨基甲酰血红蛋白
C.
碳酸氢盐
D.
氧合血红蛋白
E.
去氧血红蛋白
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】关于关系模式的键,以下说法正确的是()。
A.
一个关系模式可以有多个主键
B.
一个关系模式可以有多个候选键
C.
主键所包含的属性称为主属性
D.
不是哪个关系模式都有键
查看完整题目与答案
【单选题】()是中国历史学上的“前司马后司马”。
A.
司马昭和司马睿
B.
司马懿和司马炎
C.
司马错和司马谈
D.
司马迁和司马光
查看完整题目与答案
【单选题】“It looks as if he were drunk.” “So it does. _____.”
A.
He’d better give up drinking
B.
He shouldn’t have drunk so much
C.
Health is more important than drink
D.
I wonder why he is always doing so
查看完整题目与答案
【单选题】出土于湖南( )的四羊方尊,是目前世界上发现的最精美的商代青铜器,也是中国现存最大的商代青铜方尊
A.
宁乡
B.
岳阳
C.
梆州
D.
永丹
查看完整题目与答案
【单选题】关于关系模式的关键字,以下说法正确的是()
A.
一个关系模式可以有多个主关键字
B.
一个关系模式可以有多个候选关键字
C.
主关键字可以取空值
D.
有一些关系模式没有关键字
查看完整题目与答案
【单选题】The pills him.If only he had taken them regularly.
A.
could help
B.
may help
C.
must have helped
D.
might have helped
查看完整题目与答案
【单选题】The lad couldn’t ______ even if he ______ in time.
A.
have been saved; had been treated
B.
be saved; have been treated
C.
be saved; had been treated
D.
had been saved; would have been treated
查看完整题目与答案
【单选题】以下哪一项是中国历史学上的“前司马后司马”：()
A.
司马懿和司马炎
B.
司马昭和司马睿
C.
司马迁和司马光
D.
司马错和司马谈
查看完整题目与答案
【单选题】以下哪一项是中国历史学上的“前司马后司马”:()
A.
司马懿和司马炎
B.
司马昭和司马睿
C.
司马错和司马谈
D.
司马迁和司马光
查看完整题目与答案
【单选题】—Why didn't Mr. Smith give you one of his newlypublished books? —I didn't want one, but he would have given me one if I ________. [     ]
A.
did
B.
would
C.
will
D.
had
查看完整题目与答案
相关题目：
【单选题】关于关系模式的键,以下说法正确的是()。
A.
一个关系模式可以有多个主键
B.
一个关系模式可以有多个候选键
C.
主键所包含的属性称为主属性
D.
不是哪个关系模式都有键
查看完整题目与答案
【单选题】()是中国历史学上的“前司马后司马”。
A.
司马昭和司马睿
B.
司马懿和司马炎
C.
司马错和司马谈
D.
司马迁和司马光
查看完整题目与答案
【单选题】“It looks as if he were drunk.” “So it does. _____.”
A.
He’d better give up drinking
B.
He shouldn’t have drunk so much
C.
Health is more important than drink
D.
I wonder why he is always doing so
查看完整题目与答案
【单选题】出土于湖南( )的四羊方尊,是目前世界上发现的最精美的商代青铜器,也是中国现存最大的商代青铜方尊
A.
宁乡
B.
岳阳
C.
梆州
D.
永丹
查看完整题目与答案
【单选题】关于关系模式的关键字,以下说法正确的是()
A.
一个关系模式可以有多个主关键字
B.
一个关系模式可以有多个候选关键字
C.
主关键字可以取空值
D.
有一些关系模式没有关键字
查看完整题目与答案
【单选题】The pills him.If only he had taken them regularly.
A.
could help
B.
may help
C.
must have helped
D.
might have helped
查看完整题目与答案
【单选题】The lad couldn’t ______ even if he ______ in time.
A.
have been saved; had been treated
B.
be saved; have been treated
C.
be saved; had been treated
D.
had been saved; would have been treated
查看完整题目与答案
【单选题】以下哪一项是中国历史学上的“前司马后司马”：()
A.
司马懿和司马炎
B.
司马昭和司马睿
C.
司马迁和司马光
D.
司马错和司马谈
查看完整题目与答案
【单选题】以下哪一项是中国历史学上的“前司马后司马”:()
A.
司马懿和司马炎
B.
司马昭和司马睿
C.
司马错和司马谈
D.
司马迁和司马光
查看完整题目与答案
【单选题】—Why didn't Mr. Smith give you one of his newlypublished books? —I didn't want one, but he would have given me one if I ________. [     ]
A.
did
B.
would
C.
will
D.
had
查看完整题目与答案