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【简答题】
听下面一段材料，回答第1-4题。 1. What's the man? A. He is a doctor. B. He is a reporter. C. He is a gymnastic coach. 2. When did Sally become a member of national team? A. She was 6 years old. B. She was 16 years old. C. She was 60 years old. 3. What was Sally's dream? A. To become an excellent gymnast. B. To be able to treat her legs. C. To participate in the Olympic Games. 4. Which is true according to the Conversation? . A. The traffic accident happened last month. B. Sally was firmly convinced that she could stand up one day. C. Sally's legs were hurt during an important gymnastic match
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【多选题】海上保险的保障对象大多是从事国际贸易的经营者，因而成为一种国际性保险。它有许多与众不同的特点，其中包括：________。
A.
承保风险的综合性
B.
保险种类的多样性
C.
保障对象的多变性
D.
保险关系的国际性
E.
确定责任的复杂性
F.
保险关系复杂性
【简答题】硫酸盐呼吸是一类硫酸盐还原细菌的专性厌氧菌，在无氧条件下，以（ ）为电子受体，获得能量的方式。最终产物是（ ）。