低钾型周期性瘫痪治疗首选_________。

霍乱弧菌引起霍乱与副霍乱（）

A.大滋养体

B.内毒素

C.小滋养体

D.神经毒素

E.包囊

F.外毒素

下列关于相对湿度说法正确的是（）

A.相对湿度总是小于1

B.相对湿度可以大于1

C.相对湿度总是等于1

D.相对湿度小于或等于1

At a basic level, cloud computing is simply a means of delivering IT resources as (1) . Almost all IT resources can be delivered as a cloud service: applications,compute power, storage capacity, networking, programming tools, even communication services and collaboration (2). 　　

Cloud computing began as large-scale Internet Service providers such as Google,Amazon,and others built out their infrastructure. An architecture emerged: massively scaled, (3) distributed system resources, abstracted as virtual IT services and managed as continuously configured, pooled resources. In this architecture, the data is mostly resident on (4) "somewhere on the Internet" and the application runs on both the "cloud servers" and the user's browser. 　　

Both clouds and grids are built to scale horizontally very efficiently. Both are built to withstand failures of (5)elements or nodes. Both are charged on a per-use basis. But while grids typically process batch jobs, with a defined start and end point, cloud Service can be continuous. What's more, clouds expand the types of resources available file storage, databases, and Web Service and extend the applicability to Web and enterprise applications.

空白（2）处应选择（）

A.computers

B.disks

C.machine

D.tools

患者男性，48岁。胸痛3天，查心电图并绘制梯形图如下图所示，心房率为84次／分，该梯形图显示的心律失常是（）.

A.三度房室传导阻滞伴交界性逸搏心律

B.三度房室传导阻滞伴室性逸搏心律

C.干扰性房室分离

D.高度房室传导阻滞

E.房室结折返性心动过速

内阁最早出现在（）

A.荷兰

B.芬兰

C.德国

D.英国