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问题 单项选择题 A1/A2型题

下列哪项检查对诊断血栓闭塞性脉管炎的帮助最小？（）

A.肢体抬高试验

B.皮肤测温检查

C.X线平片

D.多普勒超声检查

E.肢体血流图

答案

参考答案：C

单项选择题

(66) is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string. (67) is a protocol that most USENET machines how use it to allow news articles to propagate from one machine to another over a reliable connection. (68) is an approach preferred by cable TV providers. In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable. (69) is a device used to connect two separate network that use different communication protocol. (70) js a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

A．Router

B．Gateway

C．Bridge

D．hub
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单项选择题

贵州的气候，极端最低气温曾经出现在（）。

A、威宁

B、玉屏

C、赫章

D、铜仁
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