According to the introductions about the endangered fish, we can infer that mostPacific salmon and steelhead

单项选择题Which of the following statements about ESA's protection efforts is NOT true

单项选择题According to the passage, setting up airline alliances will chiefly benefit

单项选择题One disadvantage of alliances foreseen by the critics is that air travel may be moreexpensive as a result of

单项选择题Which of the following is NOT a perceived advantage of alliances

单项选择题According to the passage, which of the following categories of travellers will gainmost from airline alliances