请以“越回味越有味”为题，写一篇作文。 要求：1． 文体不限，不少于600字。

分离酸性皂苷和中性皂苷可选用的方法为( )

A．铅盐沉淀法

B．丙酮沉淀法

C．乙醚沉淀法

D．酸水萃取法

E．水提醇沉淀法

当路堤原地基横坡陡于( )时，原地基应挖成台阶形。

A．1:2．
B．1:3．
C．1:4．
D．1:5

Asynchronous Transfer Mode (ATM) is a (16) that promises to change the fabric of local and wide area communications.
The key advantage of ATM is the capability to move voice, data, graphics and (17) at speeds of up to 2 gigabits per second.
An ATM switch allows you to create a (18) network that is completely independent from the (19) configuration of the network.
ATM uses a (20) called cell switching to convert data into fixed length cells of 53 bytes each, so they can be switched very quickly and efficiently.

A．technology

B．video images

C．logical

D．physical

中央银行的（）、金融监管机构的审慎监管、存款保险制度是构成金融安全网的三大支柱。

A.风险准备金制度

B.保证金制度

C.最后贷款人制度

D.货币政策

《素问·脉要精微论》指出：冬天应时的脉象是（）

A.矩

B.洪

C.权

D.规

E.衡