在多个用户共享数据库时,对同一资料的 (6) 操作可能破坏数据库的 (7) 。因此数

题型:单项选择题

问题:

在多个用户共享数据库时,对同一资料的 (6) 操作可能破坏数据库的 (7) 。因此数据库管理机制要解决丢失更新、不一致以及 (8) 等问题。解决的方法主要有加锁技术和时标技术。在加锁技术中, (9) 要求太严, (10) 会产生死锁。

A.连接

B.并发

C.查询

D.更新

考点:计算机软件水平考试高级系统分析师系统分析师
题型:单项选择题

One fine winter day some ants were working in the field. They were very busy. Just then a grasshopper(蚱蜢)passed by." Good day, kind ants(蚂蚁)," said the grasshopper. "I am very hungry. Won't you lend me a little food? (A)我没有东西吃了。 I will pay you before the next autumn. "  "Don't you have food of your own? (B)Why didn't you gather any food during the summer? You know there was much food in the field during the summer. What were you doing then?" asked an old ant. The grasshopper answered, "I (C)          (sing) all day and night during the summer. And so I had no time to gather any food. Please lend me some food. "Well, then," said the ant."(D)         You only played and did not work during the summer. We'll never lend you any food. "(E) And the ants went on working.

小题1: 将(A)处画线句子翻译成英语。                                     .

小题2: 写出(B)处画线句子的同义词。                                   ?

小题3:根据上下文及括号里的提示可知在(C)处应填入的是                  .

小题4:从下列句子中选择合适的句子填入文中(D)处。                      .

A. You sang very well and we all liked your songs very much.

B. You could sing all the summer and you also could dance all the winter.

C. You are one of the best singers here and we cheer you.

D. Would you like to perform one for us?

小题5:将(E)处画线句子翻译成汉语。                                   .

题型:单项选择题

正中时,不与对颌两个牙保持相互交错接触的牙是()。

A.上颌中切牙和上颌第三磨牙

B.下颌中切牙和上颌第三磨牙

C.上颌侧切牙

D.下颌侧切牙

E.上颌第一磨牙

题型:单项选择题

患者男性,32岁,因“发热,胸痛,咳嗽,血痰1周”来诊。患者6个月来有明显厌食,消瘦,夜间盗汗;近3个月有低热,午后体温增高,咳嗽,诊断为“感冒”,除常规治疗外加用头孢菌素等药治疗,疗效欠佳。1周来体温增高,咳嗽加剧,痰中带血。查体:体温38℃,脉搏88次/分,呼吸28次/分,发育正常,营养稍差,消瘦,意识清,查体合作,胸部查体无明显异常。实验室检查:痰液细菌培养和抗酸检查均为阴性,结核菌素试验强阳性。再次取痰送检,经浓缩集菌后涂片,抗酸性细菌阳性。影像学检查:胸部X线片见双肺纹理增粗,右肺尖有片状阴影。诊断:肺结核(右上肺)。

若该患者为复治患者,常选用的药物有()

A.异烟肼

B.利福平

C.吡嗪酰胺

D.卡那霉素

E.卷曲霉素

F.丙硫异烟胺

G.乙胺丁醇

题型:单项选择题

“夫圣人之德,又何加于此乎”中“加”意思是()

A.超过

B.增加

C.施加

D.加强

E.侵害

题型:单项选择题

管路系统的特性曲线是随着()的增加而上升。

A、流量

B、扬程

C、轴功率

D、效率

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