第5题: [单项选择]下面哪一项不是多旋翼无人机飞行前必须要做的准备（）。 A. 了解任务执行区域的气象条件 B. 确定飞行场地满足无人机说明书所规定的使用条件 C. 检查无人机各组件、电池储备、通讯链路信号等满足飞行要求 D. 确定地面有无足够长的跑道供起飞 参考答案:D
第6题: [单项选择]The weather was {{U}}crisp{{/U}} and clear and you could see the mountains fifty miles away. A. fresh B. hot C. heavy D. windy 参考答案:A 答案解析:【解析】题意：空气清新，50里以外的山峦都能看到。
句子中crisp的意思是新鲜的。
A中fresh的意思是新鲜的，新的；例句：A puppy stepped in the fresh c
A. No sooner it grew dark than B. Hardly did it grow dark that C. Scarcely had it grown dark titan D. It was not until dark that 参考答案:D 答案解析:It was not until．．．that是强调句型，作“直到……才”讲，例如：It was not until many centuries later that the ancient Gre
第13题: [单项选择]What is placed in the front seat pocket [A] Cards on entertainment. [B] Safety instruction card. [C] Boarding tickets. 参考答案:B 答案解析:[解析] 本题为细节题。飞机上前排座位的后袋中一定有飞行安全指示卡，乘客 为安全起见必须阅读上面的内容。因此答案为B。
