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【单选题】
图示电路中电压Uab为_____V。A.
21
B.
19
C.
16
D.
-16
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【简答题】Usually motor carriers compete with air for small shipments and rail for ____________ 。
【单选题】The primary advantage for motor carriers is ____.
A.
reliability
B.
speed
C.
capability
D.
flexibility
【简答题】The versatility of motor carriers is made possible in that they can transport products of ____________ and weight over any distance。
【简答题】Rail transport has disadvantages compared to motor carriers in terms of __________ and frequency of service。
【简答题】Motor-freight carriers are less __________(advantage) for transport of low-value goods.
【简答题】Motor carriers are more ________________ than other modes。
【判断题】旅游行程开始前，当发生约定的解除旅游合同的情形时，经征得旅游者同意，旅行社可以将旅游者推荐给其他旅行社组织、接待，并由旅游者与被推荐的旅行社签订旅游合同。
A.
正确
B.
错误
【简答题】Loss and damage ratios for motor carriers are substantially lower than for rail and are slightly higher than for ____________
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