题目内容

The word “trapped” (Para. 3, Line 3) means to be ________.

A. held up in a traffic jam
B. confined in the car
C. caught in an accident
D. pulled into a car

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When the two young people were married, the ceremony was anything ________ up to data.

A. but
B. beside
C. except
D. apart from

It was suggested at the meeting that effective measures ________ to solve the problem.

A. were taken
B. be taken
C. must be taken
D. take

● 对连通图进行遍历前设置所有顶点的访问标志为 false（未被访问），遍历图后得到一个遍历序列，初始状态为空。深度优先遍历的含义是：从图中某个未被访问的顶点 v 出发开始遍历，先访问 v 并设置其访问标志为 true（已访问），同时将 v 加入遍历序列，再从 v 的未被访问的邻接顶点中选一个顶点，进行深度优先遍历；若 v的所有邻接点都已访问，则回到 v 在遍历序列的直接前驱顶点，再进行深度优先遍历，直至图中所有顶点被访问过。（40）是下图的深度优先遍历序列。
（40）

A. 1 2 3 4 6 5
B. 1 2 6 3 4 5
C. 1 6 2 5 4 3
D. 1 2 3 4 5 6

Mr. Smith advised us to withdraw ________.

A. so that to get not involved
B. so as to get not involved
C. so as not to get involved
D. so that not to get involved