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项目一主要学习目标有哪些？

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Task 3 Listen to a survey report about social networks anddecide whether the following statements are true (T) or false (F).[音频]Facebook is one of the most popular social networks among employees.

A. 对
B. 错

According to Yaacov Cohen, information technology could waste our time.

A. 对
B. 错

距离测量结果,只有()测量的相对误差不低于1/3000的要求

A. 150m 0.04m
B. 200m 0.07m
C. 120m 0.05m
D. 300m 0.11m

往返丈量直线AB的长度为:其DAB=126.72m,DBA=126.76m相对误差为()。

A. K=1/3100
B. K=1/3200
C. K=0.000315
D. K=1/3500