阅读下面的程序段：执行上面的三重循环后，a的值为（） A.3 B.9 C.14 D

通过下表，可以总结出“在原子里质子数等于电子数”．

（1）______．

（2）______．

（3）______．

（4）______．

— I am so sorry to have come late for the meeting.  

— It is not your fault. With _______ rush-hour traffic and ______ heavy rain, it is no wonder

      you were late.[ ]

A.a; a       

B. the; the          

C. /; /              

D. /; a

The CCTV Spring Festival Cala Evening         annually since 1983 and it is still very popular with most Chinese.

A．was ran

B．is running

C．had been run

D．has been running

下列现象中，能表明分子在不停地做无规则运动的是（  ）

A．蒙蒙细雨从空中下落

B．擦黑板时，粉笔灰在空中飞舞

C．水和酒精混合后体积变小

D．炒菜时，满屋飘香

BSP方法按照信息的生命周期将数据划分为事务类数据、计划类数据、统计类数据和

A．存档数据

B．职能数据

C．中间数据

D．目标数据