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问题 选择题

印度茶园多分布在（   ）

A．印度河平原

B．恒河平原

C．德干高原

D．布拉马普特拉河两岸

答案

D 

本题考查了印度农业分布区位，布拉马普特拉河两岸排水条件好，水汽多，又位于山坡上种植茶叶的区位条件较好。

单项选择题

渗碳体的性质，硬度为ＨＢ＝（）Ｋg/ｍｍ２。

A．５００

B．６００

C．７００

D．８００
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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 now 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 opt~electrical 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) is 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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