The most important factor affecting airway resistance is A: air velocity B: airflow C: respiratory tract length D: caliber of respiratory tract

中国大学MOOC: Consonants are formed by interrupting, narrowing or diverting the airflow in a variety of ways. There are three ways of classifying the English consonant sounds: __________ of articulation, manner of articulation and voicing.

‎Consonants are formed by interrupting, narrowing or diverting the airflow in a variety of ways. There are three ways of classifying the English consonant sounds: __________ of articulation, manner of articulation and voicing.‎ A: place B: obstruction C: aspiration D: vibration

丰田认为家用轿车才是以后的出路，1940年丰田推出了AE轿车，这次模仿的是（）车型。 A: Airflow B: 甲壳虫 C: 沃尔沃PV60 D: 奔驰