【单选题】选择过滤器时,空气过滤器的处理风量应( )其额定风量。
【单选题】If the president wants to put a treaty into effect, he has to get the approval by two thirds of the _____.
【判断题】空气过滤器的处理风量应小于或等于额定风量
【单选题】4) The president wants to see their national flag _______ on the surface of Mars by 2019.
【单选题】The president wants to see their national flag ______ on the surface of Mars by 2019.
【单选题】在选择过滤器时,空气过滤器的处理风量应( )其额定流量。
【单选题】The president wants to improve the nation's highways and mass ____________ systems.
【判断题】If the president wants to put a treaty into effect, he has to get the approval by two thirds of the senate.
【简答题】诗人冯至借助 “蛇”这个意象,抒发了怎样的感受和渴望?