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【单选题】
设 在 上三次可导,若 , 在 上有界,则A.
, 在 上都有界。
B.
在 上有界， 在 上无界。
C.
在 上有界， 在 上无界。
D.
在 上都有界。
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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.
【多选题】能够检出“computer code system”的检索式有()。
A.
computer 2N system
B.
computer 1N system
C.
computer N system
D.
computer 1W system
【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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