综合填空。

     Are you able to send a letter with pictures and sounds to someone anywhere in the world without putting

a stamp on it? W______(1) e-mail you can just do that. Using a c______(2) you can send e-mail quickly and

easily. The post is much s______(3) than e-mail. E-mail can send i______(4) message to the other side of the

world in seconds.

     E-mail is easy to use and it s______(5) time and money. The differences in time in different parts of the

world, do not matter w_______(6) sending e-mail. It is twenty-four-hour service that you can send e-mail at

any time of the day or n_______(7). No one has to be t_______(8) to receive e-mail. It d_______(9) matter

if your friends are in bed when you send e-mail to them, or you are seeing a f_______(10) at the cinema when

they send e-mail back.

下列不是血竭特征的是（）

A.药材表面铁黑色或黑红色，附有红色粉末

B.燃烧呛鼻，无松香气

C.研成粉末血红色

D.在水中溶解

E.无臭，味淡