第30题: [单项选择]What do they eat for lunch and for supper A. A green salad for lunch and some beefsteak for supper. B. Some bread and potatoes for lunch, and some meat for supper. C. Some bread for lunch and a green salad for supper. 参考答案:A 答案解析:[听力原文]10-12 M: What food shall I buy today W: I want a green salad for lunch. For supper, I w
第31题: [单项选择]低速飞行时的飞机阻力包括() A. 摩擦阻力、诱导阻力、干扰阻力、激波阻力 B. 摩擦阻力、压差阻力、诱导阻力、激波阻力 C. 摩擦阻力、诱导阻力、干扰阻力、激波阻力 D. 摩擦阻力、压差阻力、诱导阻力、干扰阻力 参考答案:D