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If itfor the snow, wethe mountain yesterday()

A. were not, could have climbed
B. were not, could climb
C. hadn’t been , could have climbed
D. hadn’t been, could climb

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Questions1 to 4 are based on the conversation you have just heard()

A) It can benefit professionals and non-professionals alike
B) It lists the various challenges physicists are confronting
C) It describes how some mysteries of physics were solved
D) It is one of the most fascinating physics books ever written

下列有关IBM大型商用计算机表述不恰当的是()

A. IBM System/360是第一台采用集成电路的计算机,首次采用标准的输入输出接口和通用的输入输出设备,它们与中央处理器相对独立,有利于系统升级
B. IBM System/360之父布鲁克斯在计算体系结构、操作系统、软件工程方面所做出的具有里程碑意义的贡献
C. 小沃森对IBM700系列大型机具有重要贡献
D. 1957年,当时世界上运转速度最快、运算能力最强、信息存储最多的计算机来自于IBM

The theory of “selective photothermal effect” of laser treatment, pulse time()thermal relaxation time of target tissue

A. longer than
B. shorter than
C. equal to
D. equal to or shorter than
E. equal to or longer than

Biopsy materials for bullous dermatoses should be selected()

A. Fresh blister
B. Old blister
C. Blood blister
D. Pustules
Erosion

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