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【单选题】
双绞线可以用来作为 的传输介质。A.
只是模拟信号
B.
只是数字信号
C.
数字信号和模拟信号
D.
只是基带信号
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【单选题】虽然解决了桥梁构造设计的难题，实际建造中仍然面临许多困难。
A.
Although the problem of the design for the structure of the bridge has been overcome, we are still confronted with many difficulties concerning its actual construction.
B.
Although the problem of the design for the structure of the bridge has been overcome, we still confront many difficulties concerning its actual construction.
C.
/
D.
/
【简答题】教师被人们誉为“灵魂的工程师”，这说明教师扮演了（ ）角色。
【单选题】虽然解决了桥梁构造设计的难题，实际建造中仍然面临许多困难。
A.
Although we have overcome the problem of the design for the structure of the bridge, we still confront many difficulties concerning its actual construction.
B.
Although the problem of the design for the structure of the bridge has been overcome, we are still confronted with many difficulties concerning its actual construction.
C.
/
D.
/
【单选题】虽然解决了桥梁构造设计的难题，实际建造中仍然面临许多困难。
A.
Although we have overcome the problem of the design for the structure of the bridge, we are still confronted with many difficulties concerning its actual c onstruction.
B.
Although the problem of the design for the structure of the bridge has been overcome, we still confront many difficulties concerning its actual construction.
C.
/
D.
/
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