题目内容：
The economics of sea-air combination mode favors high value items like（ ）．
参考答案：
答案解析：
多选题：The economics of sea-air combination mode favors high value
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Multimodal transport has the following advantages：（ ）．
Multimodal transport has the following advantages：（ ）．
回答33题：
回答33题：
Through Bills of Lading cover from or to ports involving tra
Through Bills of Lading cover from or to ports involving transport by two or mor
The difference between the muhimodal transport by rail/road/
The difference between the muhimodal transport by rail/road/inland waterways—sea
1990年9月，美国批准了世界上首个基因治疗方案。从此，世界各国掀起了研究基因治疗的热潮。值得提出的是，无论哪一种基因治
1990年9月，美国批准了世界上首个基因治疗方案。从此，世界各国掀起了研究基因治疗的热潮。值得提出的是，无论哪一种基因治疗目前都处于初期的临床试验阶段，均没有稳