第1题: [单项选择]Questions 26 to 29 are based on the passage you have just heard.A. Life stress induced excess of stomach acid. B. Human could live with too much stomach acid. C. Stomach aches were caused by stomach acid. D. Bacteria could survive in stomach acid. 参考答案:D 答案解析:[解析] Q: What did Barry Marshall’s drinking a cocktail with bacteria prove
第16题:[单选题]GPS接收机进入高度辅助方式的条件是: A.在GPS完成搜索方式后,只能接收三颗卫星信号时进入此方式。 B.在GPS完成搜索方式后,只能接收两颗卫星信号时进入此方式。 C. 在GPS完成导航方式后,只能接收三颗卫星信号时进入此方式。 D. 在GPS完成导航方式后,只能接收两颗卫星信号时进入此方式。 参考答案:C