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【多选题】
左心房肥大下列哪些描述是正确的A.
P波增宽
B.
P波可双峰
C.
P波在V1导联多呈双向
D.
常见于二尖瓣病变
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】逆流倍增机理的原动力主要是
A.
近曲小管对 NaCl 的重吸收
B.
髓袢升支细段对 NaCl 的重吸收
C.
髓袢升支粗段对 NaCl 的重吸收
D.
远曲小管对 NaCl 的重吸收
E.
集合管对 NaCl 的重吸收
【单选题】Which of the following is the description of the computer instruction system?
A.
Instruction system is the set of all instructions that the computer can execute.
B.
The instruction system is the set of all instructions that constitute a computer program.
C.
Instruction system is a set of programs in a computer.
D.
Instruction system is a set of instructions and data in a computer.
【简答题】parallel resonant
【单选题】The firewall device is a( )system for connecting a computer network to other computer network．
A.
hardware
B.
software
C.
security
D.
I／O
【单选题】The computer network is a creation of the electronic age. In a computer system, a hacker is worse than a thief entering your house. He could go through anyone's electronic mail or add to, change, dist...
A.
To show that a hacker is more dangerous than a thief.
B.
To tell people that thieves like to steal computers nowadays.
C.
To demand that a computer network should be set up against thieves.
D.
To look into the case where hackers and thieves are the same people.
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