动脉中流动的是动脉血，静脉中流动的是静脉血。（）

不是瓜蒂散主治证的是

A．胸中痞硬

B．心下烦而满，饥不能食

C．欲吐不出

D．寸脉微细

E．气上冲咽喉不得息

B超诊断甲状腺瘤的依据除内部回声光点均匀外，还具备有_______。

The major problem with E-mail is that it is (71) easy to use that people can become (72) with messages (73) they can possibly answer in a day. In addition, mail boxes require some management to (74) messages or archive those that might be required later. Senders don’t always know about your E-mail backlog and often send (75) messages.

A．too

B．so

C．very

D．much

“香山红叶”是北京闻名中外的景点，所谓“红叶”大多数是指什么树的叶子？

简述公共政策制定系统内部的结构类型。