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问题 解答题
计算：（
2
-1）0×（
1
2
）-1+
2
sin45°．
答案

（

2
-1）0×（
1
2
）-1+
2
sin45°

=1×2+

2
×
2
2

=2+1

=3．

单项选择题 A1型题

维生素A的主要食物来源不包括（）

A.肝

B.乳类食品

C.豆制品

D.蛋黄

E.深色蔬菜
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单项选择题

In the process of communication requirement analysis, the project manager should consider the number of potential communication channels or paths as an indicator of the complexity of a project's communication. According to Metcalfe's Law, a project with 10 stakeholders has（）potential communication channels.

A.10

B.45

C.50

D.100
查看答案