在EC2的安全与容错机制中,一个用户目前最多可以创建()个安全组A、50 B、100C

题型:单项选择题

问题:

在EC2的安全与容错机制中,一个用户目前最多可以创建()个安全组

A、50

B、100

C、150

D、200

考点:信息系统集成项目经理继续教育信息系统集成项目经理继续教育题库
题型:单项选择题

保险公司的股东利用关联交易严重损害公司利益,危及公司偿付能力的,国务院保险监督管理机构不能采取下列()措施。

A.责令改正

B.限制股东权利

C.责令转让股权

D.给予行政处罚

题型:单项选择题
把下列代数式的代号填入相应的集合括号里.
(A)a2b+ab2(B)
3
5
x-x2+1(C)
a+b
2
(D)-
xy2
3
(E)0
(F)-x+
y
3
(G)a2+ab2+b3(H)
2xy
a
(I)3x2+
2
y

(1)单项式集合______;
(2)多项式集合______;
(3)整式集合______;
(4)二项式集合______;
(5)三次多项式集合______;
(6)非整式集合______.
题型:单项选择题
如图所示,理想变压器的原副线圈匝数比n1:n2=1:10,副线圈与阻值R=20Ω的电阻相连.原线圈两端所加的电压u=20sin20πt(V),则(  )

A.副线圈输出交流电的频率为10Hz

B.交流电压表的示数为20V

C.电阻R上消耗的电功率为2kW

D.原线圈中电流的最大值为100A

题型:单项选择题

任务型读写。

     请认真阅读下列短文,并根据所读内容在文章后表格中的空格里填入最恰当的单词。

注意:每空格1个单词。

     President Barack Obama shouldn't be surprised if his approval rating among students has plummeted

(陡然变差). In a recent speech about US education, he called for extending the school day and year. "The

challenges of a new century demand more time in the classroom. Why more time? Because US students

are falling behind students in other countries," he said.

     More school

     US schools need to lengthen school days and the school year. If we intend to stay competitive with

the rest of the world on test scores and in the job market, we need to add classroom hours and get rid of

summer break almost entirely. As President Obama said, South Korean students spend more than a month

longer in school-and achieve better results than us.

     The current two-term school year and the school days that form it were developed based on an old

system of agriculture. The long summer break allowed children to be home to help tend the fields. It is not

necessary anymore. It may not be popular to cut summer break or extend school days, but that's the only

way to improve US education and get back the American jobs lost to foreign countries.

     Home Time

     Adding school hours won't solve the problems with our school system. The USA is different from other

countries. US families have full schedules, with participation in sports, community groups, and other interests.

In places such as South Korea, where only several hours of a day aren't spent on school work, children don't

have time to participate in many of those activities.

     Giving kids time outside of school allows them to grow in other areas. That's just as important as learning

fractions (分数). Fingers shouldn't be pointed at the school year for being too short, but at teachers and

schools that don't challenge their students and just pass kids along to the next grade. We do need to hold

ourselves accountable for an education system falling behind other countries, but we also need a solution that

actually works.

1______2______3______4______5______6______7______8______9______10______

题型:单项选择题

新建变电站选站时应避让()级污区;如不能避让,变电站宜采用GIS、HGIS设备或全户内变电站。

A.a;

B.b;

C.c;

D.d;

E.e。

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