A: What’s the date today
B: It’s June 16.
A: (1) Then it’s the Dragon Boat Festival today, isn’t it
B: Yes. (2)
A: Did you have rice dumplings this morning
B: Sure. (3)
A: I didn’t.
B: What a pity! But I happen to have got some with me. (4)
A: I’d love to. By the way, why do you call it the Dragon Boat Festival
B: Because in China, people race dragon boats this day every year.
A: Oh, I see. (5)
B: You are welcom
A. We Chinese usually eat rice dumplings this day.
B. I hate eating rice dumplings.
C. Thank you for your rice dumplings.
D. I don’t think so.
E. Would you like to have one
F. Already
G. How about you
第（1）空应选择（）
与
的接触面是水平的。绳子呈水平状态，木块
均保持静止。则关于木块
和木块
可能的受力个数分别为