打开一个数据库的命令是( )。A.USE B.USE DATA BASE C.OPE

题型:单项选择题

问题:

打开一个数据库的命令是( )。

A.USE

B.USE DATA BASE

C.OPEN

D.OPEN DATABASE

考点:计算机等级考试VISUALFOXPRO二级VISUALFOXPRO笔试
题型:单项选择题

患儿男性,7岁,小学二年级学生,因上课注意力不集中、学习困难来就诊。患儿自上幼儿园起即开始好动,常常坐不住,不能安静坐下来听故事或看图书。上学后,老师经常反映患儿上课坐不住,小动作多,注意力不集中,常东张西望,而且经常因为粗心大意而出错。患儿爱插话或接话茬,情绪不稳定,常因一点小事而发脾气,学习成绩仅能达到及格水平。该患儿考虑是()。

A、正常儿童

B、精神发育迟滞

C、儿童多动症

D、学习困难

题型:单项选择题

阅读理解。

     Traveling is fun because you can see how people in other parts of the

world live. One thing travelers don't of-ten think about before traveling is

how other cultures bathe ( take a bath). And bathrooms in many countries

may be different from the kind you are used to.

     In the United States , most people take a shower once a day in the

morning. The showerhead is usually mounted on the wall and cannot be

moved. The bather simply stands under the water, gets wet, scrubs (撩) with

soap and often a washcloth , and then rinses off(洗掉) .

     Children often take a bath each night and enjoy playing with small toys

such as boats and rubber ducks. Many adults, especially women, enjoy a

relaxing bath to get rid of stress at the end of the day.

      It is important to remember that when you take a shower or bath in the

United States, you should be careful to keep the water inside the bathtub or

shower. Unlike bathrooms  in  many  countries, there is no drain (下水道 )in the floor. If water gets on the floor it cannot go anywhere and must be

cleaned up with a towel or mop. It can also cause problems for the floor. So be careful.

l. We can't read it,but the reading infers that_______.

A. Americans often take a shower in the morning

B. children often bathe before going to bed at night

C. many women take quite some time to have a bath in the evening

D. Americans bathe in the same way as in some other countries

2. We can get "hint" in the reading that_______.

A. all the bathrooms in different countries are the same

B. Americans don't clean the floor after bathing at home

C. problems will appear if you bathe with too much water in the bathtub in

the US

D. Americans enjoy traveling in the world

3. The reading doesn't tell,but we can see that_______.

A. traveling to different countries can bring us a lot of knowledge

B. a towel or a mop is used for bathing in America

C. without toys children don't bathe or take a shower

D. soap is the only thing that can help people scrub the dirt off their bodies

题型:单项选择题

成瘾小,影响快动眼睡眠时相小的安眠药:

A.哌替啶

B.地西泮

C.氯丙嗪

D.甲丙氨脂

E.苯巴比妥

题型:单项选择题

三级抽象模式在数据库系统中都存储于数据库系统的______中。

题型:单项选择题

在数字式显示仪表中,A/D转换的主要任务是______。

A.将信号处理成线性特性,以提高仪表测量精度
B.将工艺变量转换为电压或电流值
C.使连续变化的模拟量转换为断续变化的数字量
D.将较小的输入信号放大至伏级电压幅度

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