持续训练法主要用于提高运动员的动作技术。 ( )

等差数 * * ，8，11，……与等差数 * * ，8，13，……都有100项，那么这两个数列相同的项共有______________项。

任何自然带都具备的特征是（ ）

①有一定的热量和水分组合     ②有代表性的植被和土壤类型

③有典型的地质环境和水文条件 ④占有一定宽度，呈长带状分布

A．①②③

B．①②④

C．①③④

D．②③④

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
A socket is basically an end point of a communication link between two applications. Sockets that extend over a network connect two or more applications running on (31) computers attached to the net-work. A socket (32) two addresses: (33) . Sockets provide a (34) communication channel between one or more systems. There are (35) sockets separately using TCP and UDP.

A．message and packet

B．packet and frame

C．stream and datagram

D．flow and block

强心苷禁用于（）

A.室上性心动过速

B.室性心动过速

C.心房扑动

D.慢性心功能不全

E.心房颤动

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