关系数据模型有许多优点,但下面所列的条目中______不是它的优点。A.结构简单 B

题型:单项选择题

问题:

关系数据模型有许多优点,但下面所列的条目中______不是它的优点。

A.结构简单

B.适用于集合操作

C.有标准语言

D.可表示复杂的语义

考点:计算机等级考试数据库技术计算机三级(数据库技术)65
题型:单项选择题

Some teenagers admire those excellent artists who gain their success through their great efforts while ___16___ envy those young actresses who are discovered by famous directors and start glittering careers ___17___ their early 20s. Like Gong Li and Zhang Ziyi who were discovered by Zhang Yimou, the new lucky girl is 19-year-old Zhang Yuqi from Shandong Province.

__18__  (choose) by Hong Kong comedy actor and director Stephen Chow, Zhang made her first film performance in Chow's new successful movie, CJ7 or A Hope. The movie___19__(bring ) to the screen on January 31, 2008.

In the sci-fi movie, Chow plays a poor father working very hard to support his 9-year-old son. One day, Chow discovers a strange "toy" in the garbage __20__gives it to his son as a birthday present. Soon the "toy" turns out to be a communication device lost by aliens, who__21__(desperate) want it back. Zhang stars as his son's beautiful teacher, with __22__  Chow falls in love, not knowing that she is a robot. Although Zhang feels ___23___(fortune), as A Hope has made her__24__ overnight star, the student at Shanghai Drama Academy has to learn to adapt to the competitive film world.

"It's a good start, a good opportunity and a stressful challenge as well for__25__ age," Zhang said.

题型:单项选择题

对于明星、偶像,我们应该崇拜他们的[ ]

A、光彩照人的外表       

B、无人能比的技艺

C、成功背后的奋斗精神和品质   

D、酷毙了的行为动作

题型:单项选择题

图所示,光线A、B为光源S发出的两条光线经平面镜反射后的反射光线,

请在图中作出平面镜并完成光路图.

题型:单项选择题

压力容器上的压力表的检验周期为至少每()一次。

A.半年

B.一年

C.二年

题型:单项选择题

某女,43岁,因吵架出现性情急躁易怒,口苦而干,头痛,耳赤,大便秘结,舌红,苔黄,脉弦数。其辨证为( )

A.气郁化火

B.肝气郁结

C.肝肾亏虚

D.心神惑乱

E.痰气郁结

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