1、the following diagram  is（）network topology structure

a、bus

b、star

c、ring

d、tree

信管網(wǎng)解析：

下面的圖表是（）網(wǎng)絡拓撲結構

a、總線型

b、星型

c、環(huán)型

d、樹型

信管網(wǎng)參考答案：a

72、the main types of social networking services are those that contain category places (such as former school year or classmates), means to connect with friends (usually with self-description pages), and a recommendation system linked to （）.

a、net

b、interests

c、others

d、trust

信管網(wǎng)解析：

主流類型的社交網(wǎng)絡通常包含一些諸如校友或同學等分類的場所，這些朋友通常會有自我介紹，而且社交網(wǎng)絡也是一種基于（）關系的推薦系統(tǒng)

a、網(wǎng)絡

b、興趣

c、其它

d、信任

信管網(wǎng)參考答案：d