“手不释卷”的典故指的是谁？
参考答案：
“手不释卷”的典故指的是吕蒙。
完成下列对话。
Zoom: Hurry up. It's 6 o'clock now.
Zip: Just a minute. White 1. ? Red 2. ? Orange 3. ? Oh, yes!
I have a new 4. for my birthday party.
Zoom: What colour is it?
Zip: It's green.
Zoom: This yellow 5. is beautiful.
如图所示，土样高25cm，e＝0.75，ds＝2.68，试求渗透的水力梯度达到临界时的总水头差。
? Red 2. 
? Orange 3. 
? Oh, yes!
for my birthday party. 
is beautiful.