問題詳情

【題組】68．According to the passage，the greatest challenge to the new high-speed railway plan is ．
(A)technical issues
(B)safety of the system
(C)financial problems
(D)maintenance of railway tracks

參考答案

答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)