题目内容

18 An atom of ordinary carbon has six protons and eight neutrons
A Right
B Wrong
C Not mentioned

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61 A those B these C other D another

40 Another good title for this passage would be
A Robots: Taking the Place of Humans.
B Artificial Intelligence Programs.
C Modern-Day Sensors.
D Today’ S Robots and How They Function

某工程单目标双代号网络计如下图所示，图中的错误是()。

A. 有多个起点节点
B. 有多个终点节点
C. 有双向箭头联线
D. 有循环回路

[A] over
[B] around
[C] fast
[D] all day