In (85) software, one question of near-uni

发布时间：2018-06-08 08:26 │ 来源：www.tikuol.com

题型：单项选择题

问题：

In (85) software, one question of near-universal interest is how rapidly Windows NT, which began shipping last summer, will be (86) in the marketplace and for what uses. For the most part, observers are (87) about the operating system’s long term prospects, but expect it to remain on (88) rather than desktops during 1994, saying that it won’t become a mainstream product until (89) PCs typically have 16 to 24 MB of RAM, which is unlikely to happen next year.

A．applications

B．accepted

C．clients

D．enthusiastic

E．servers

F．desktop

G．systems

H．replaced

考点：计算机软件水平考试中级数据库系统工程师数据库系统工程师

题型：单项选择题

WHO制定的2010年口腔健康目标中5～6岁儿童无龋率应该是

A．80%

B．60%

C．50%

D．70%

E．90%

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题型：单项选择题

On Sunday morning, I usually get up very late. I wash my face, and then go out to do morning exercises. It is about 8: 40 am. After I eat my　　, I often go to a shopping centre　 my mother. The shopping centre is　 our home, so we walk there. It takes us about 20 minutes to get there. The shopping centre has a good　 . It is called“蓝莓购物中心”in Chinese. It doesn’t have an English name. Can you　 it in English? It is new and big. There are many things there, such as TVs, fridges, computers, clothes, food　 drinks. There are many every day. There are men and women, the old and the .　　do many people come here to buy things? Do you know? Let me tell you. The workers there are always nice and friendly. The things there are usually good but not　 . If you come to my home, I can take you there and have a look.

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题型：单项选择题

某实验小组探究“烟草浸出液对水蚤心律的影响”，进行了下列实验。

材料和条件：

15℃的室温下，用10只大小一致、10秒内水蚤跳动范围在30-36次之间的成年水蚤，做A、B两组实验，观察水蚤10秒内心跳次数，四份等量的香烟烟丝中分别加入20mL、30 mL、40 mL、50 mL的蒸馏水浸泡1天的浸出液。

实验方法：

①A组：每只水蚤先放在清水中计数，重复3次。

②B组：将A组的水蚤分别移入20mL、30 mL、40 mL、50 mL蒸馏水的浸出液，同样重复3次。

③处理数据：分别计算出A、B两组实验数据的平均值，将得到的数据绘成如下曲线图。

分析回答：

（1）根据曲线，我们可知烟草浸出液对水蚤心率具有___________作用，浓度越高，则__________。

（2）设置A的作用是__________，在A、B实验过程中，要求相同的室温条件、大小一致的水蚤、等量的香烟烟丝等这些条件，这样做的目的是__________。

（3）通过这个实验，我们可以认识到烟草对生物体是有影响的。请你用所学到的知识分析吸烟对健康的危害：________________________________________。

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题型：单项选择题

草原生态系统从垂直分布来说可分为______、地面层和根层。

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题型：单项选择题

六氟化流（SF₆）断路器发全（）等事故，值班人员接近设备时应谨慎，必要时要戴防毒面具，穿防护服。

A.故障掉闸

B.低气压闭锁装置动作

C.意外爆炸

D.严重漏气

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