【简答题】听对话,回答问题。 1. What time was it when they thought of stopping the car? [ ] A. 10:30. B. 12:30. C. 2:30. 2. Why did they want to stop the car? [ ] A. To eat something. B. To have a walk. C. To lo...
【多选题】下列哪些氨基酸,属于成年动物的必需氨基酸?
【单选题】One of the mechanical solutions to car pollution is
A.
to change the chemical structure of fuel.
B.
to improve on the exhaust pipe.
C.
to experiment with new engines.
D.
to monitor the amount of chemicals.
【单选题】在 Windows窗口左侧窗格中单击某个磁盘,则().