(1)1molN含有________mol质子 (2)1.7gH2O2含有的原子

题型:填空题

问题:

(1)1molN含有________mol质子

(2)1.7gH2O2含有的原子数为________NA

(3)1molNa+含有________mol电子

(4)2.4g金属镁变成Mg2+失去电子数为________个

(5)用NA代表阿伏加德罗常数的值,如果ag某气体中含有的分子数为b,则cg该气体在标准状况下的体积是________L

(6)现有mg某气体,它由双原子分子构成,它的摩尔质量为Mg·mol-1。若阿伏加德罗常数用NA表示,则:

a.该气体溶于1L水中(不考虑反应),其溶液中溶质的质量分数为_______。

b.该气体溶于水后形成VL溶液,其溶液的物质的量浓度为_____ mol·L-1

考点:物质的量的有关计算
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When Ted Kennedy gazes from the windows of his office in Boston, he can see the harbor’s "Golden Stairs", where all eight of his great-grandparents first set foot in America. It reminds him, he told his Senate colleagues this week, that reforming America’s immigration laws is an "awesome responsibility". Mr. Kennedy is the Democrat most prominently pushing a bipartisan bill to secure the border, ease the national skills shortage and offer a path to citizenship for the estimated 12m illegal aliens already in the country. He has a steep climb ahead of him.

As drafted, the bill seeks to mend America’s broken immigration system in several ways. First, and before its other main provisions come into effect, it would tighten border security. It provides for 200 miles (320km) of vehicle barriers, 370 miles of fencing and 18000 new border patrol agents. It calls for an electronic identification system to ensure employers verify that all their employees are legally allowed to work. And it stiffens punishments for those who knowingly hire illegals.

As soon as the bill was unveiled, it was stoned from all sides. Christans, mostly Republicans, denounced it as an "amnesty" that would encourage further waves of illegal immigration. Tom Tancredo, a Republican congressman running for president (without hope of success ) on an anti-illegal-immigration platform, demanded that all but the border-security clauses be scrapped. Even these he derided as "so limited it’s almost a joke". Conservative talk-radio echoed his call. No one is seriously proposing mass deportation, but Mr. Tancredo says the illegals will all go home if the laws against hiring them are vigorously enforced.

Most labor unions are skeptical, too. The AFL-CIO denounced the guest-worker program, which it said would give employers "a ready pool of labor that they can exploit to drive down wages, benefits, health and safety protections" for everyone else. Two Democratic senators tried to gut the program. One failed to abolish it entirely; another succeeded in slashing it from 400000 to 200000 people a year.

Employers like the idea of more legal migrants but worry that the new system will be cumbersome. Many object to the idea that they will have to check the immigration status of all their employees. The proposed federal computer system to sort legal from illegal workers is bound to make mistakes. Even if only one employee in a hundred is falsely labelled illegal, that will cause a lot of headaches. And the points system has drawbacks, too. Employers are better placed than bureaucrats to judge which skills are in short supply. That is why the current mess has advantages—illegal immigrants nearly always go where their labor is in demand.

Other groups have complaints, too. Immigrant-rights groups say that the path to citizenship would be too long and arduous and too few Hispanics would qualify. Nancy Pelosi, the Democratic speaker of the House, fretted that the new stress on skills would hurt families, adding that her party is "about families and family values". Some people worry that House Democrats will kill it to prevent Mr. Bush from enjoying a domestic success.

Despite the indignation, public opinion favors the underlying principles. At least 60% of Americans want to give illegals a chance to become citizens if they work hard and behave.

Which of the following is true about the present bill()

A. The bill is widely supported by various political strips

B. The bill will impose severe punishment on illegal immigrants

C. The bill is designed to improve American immigration system

D. The bill will ensure that no illegals are knowingly hired

题型:填空题

在Visual FoxPro中,程序文件的扩展名为( )。

A..OPR

B..PRG

C..PJX

D..SCX

题型:填空题

电子音乐的代表作曲家有()。

A.瓦雷兹

B.施托克豪森

C.亨利

D.沙弗尔

题型:填空题

关于皮下注射疫苗,下面哪一项技术操作是错误的()

A.用于流脑疫苗、流脑A+C、麻疹疫苗、风疹疫苗和腮腺炎疫苗

B.接种部位为上臂外侧三角肌中部

C.针头斜面向上,与皮肤表面成30~40°角

D.快速刺入皮下约至针头长度的1/3~2/3,放松皮肤,左手固定针管,回抽无血后,注入疫苗

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2个月女孩,因皮肤、巩膜黄疸1个月入院。入院后查体:皮肤、巩膜中度黄染,腹部平软,肝肋下3cm,脾肋下2cm。临床疑似HCMV感染。

请补充重要病史和体征()

A.是否为剖宫产

B.母亲妊娠情况

C.是否伴有发热、咳嗽

D.是否伴有头痛、呕吐

E.是否有头小畸形

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