情景交际
在对话的空白处填写恰当的单词，使对话完整、正确。每空一词。
Lily: This Saturday I’m going to a Japanese friend’s house for dinner. I’m so nervous, because this is my first meal in a Japanese house. Am I (1) to do anything special?
Rose: There’s (2) to be nervous about. Just be yourself.
Lily: Oh, come on! There must be (3) special. Am I supposed to bow when I see them?
Rose: You can just (4) what they do. If they bow, you should do so, too.
Lily: OK. What about the meal? Am I supposed to eat with (5) ?
Rose: Yes, they’ll probably have them at the table. By the way, do you know you should not (6) your chopsticks into your rice?
Lily: No, I don’t. That’s (7) I ask you these questions. Is a spoon
(8) for drinking their soup?
Rose: Sometimes, but they can drink it from the bowl. They can make (9) when drinking their soup.
Lily: Why do they do that?
Rose: I guess it’s just their (10) of showing that they think it’s delicious.
Lily: Oh, I see. Thank you so much for your help.
Rose: My pleasure. Please enjoy your meal!
，现由静止释放A、B，B物块着地后速度立即变为0，同时弹簧锁定解除，在随后的过程中B物块恰能离开地面但不继续上升．第二次用手拿着A、B两物块，使得弹簧竖直并处于原长状态，此时物块B离地面的距离也为H，然后由静止同时释放A、B，B物块着地后速度同样立即变为0．求：
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