A：平抛运动是非匀变速运动
B：平抛运动是匀速运动
C：平抛运动是匀变速曲线运动
D：平抛运动的物体落地时的速度一定是竖直向下的
给下列句子选择正确的答语
____Is he drinking water? A. Yes, they are.
____Can you take him to the park? B. No, he isn't. He's eating.
____Whose book is this? C. He's in the kitchen.
____Are these all ours? D. It's Mike's.
____Where is Fido now? E. Of course.
划线词解释正确的是（ ）
下列说法中，不正确的是（ ）
写出邮寄包裹的方法和步骤：
