问题 问答题

锌是人体健康必需的元素,锌缺乏容易造成发育障碍,易患异食癖等病症,使人体免疫功能低下.市售的葡萄糖酸锌口服液对治疗锌缺乏症具有较好的疗效.下图是某品牌葡萄糖酸锌口服液的标签,请根据标签信息回答:

XX牌口服液

主要成分:葡萄糖酸锌

化学式:C12H22O14Zn

含锌量:每只口服液含锌6.5mg

XX制药厂

(1)葡萄糖酸锌由______种元素组成;

(2)葡萄糖酸锌的相对分子质量为______;

(3)葡萄糖酸锌中锌元素的质量分数为______.(精确到0.1%)

答案

(1)由葡萄糖酸锌的化学式可知,它由碳、氢、氧、锌4种元素组成.故答案为:4.

(2)葡萄糖酸锌的相对分子质量为:12×12+1×22+16×14+65=455,故答案为:455.

(3)葡萄糖酸锌中锌元素的质量分数为

65
455
×100%≈14.3%,故答案为:14.3%.

单项选择题

President Bush takes to the bully pulpit to deliver a stern lecture to America’s business elite. The Justice Dept. stuns the accounting profession by filing a criminal indictment of Arthur Andersen LLP for destroying documents related to its audits of Enron Corp. On Capitol Hill, some congressional panels push on with biased hearings on Enron’s collapse and, now, another busted New Economy star, telecom’s Global Crossing. Lawmakers sign on to new bills aimed at tightening oversight of everything from pensions and accounting to executive pay.

To any spectators, it would be easy to conclude that the winds of change are sweeping Corporate America, led by George W. Bush, who ran as "a reformer with result." But far from deconstructing the corporate world brick by brick into something cleaner, sparer, and per, Bush aides and many legislators are preparing modest legislative and administrative reforms. Instead of an overhaul, Bush’s team is counting on its enforcers, Justice and a newly empowered Securities & Exchange Commission, to make examples of the most egregious offenders. The idea is that business will quickly get the message and clean up its own act.

Why won’t the outraged rhetoric result in more changes For starters, the Bush Administration warns that any rush to legislate corporate behavior could produce a raft of flawed bills that raise costs without halting abuses. Business has striven to drive the point home with an intense lobbying blitz that has convinced many lawmakers that over-regulation could startle the stock market and perhaps endanger the nascent economic recovery.

All this sets the stage for Washington to get busy with predictably modest results. A surge of caution is sweeping would-be reformers on the Hill. "They know they don’t want to make a big mistake," says Jerry J. Jasinowski, president of the National Association of Manufacturers. That go-slow approach suits the White House. Aides say the President, while personally disgusted by Enron’s sellout of its pensioners, is reluctant to embrace new sanctions that frustrate even law-abiding corporations and create a litigation bonanza for trial lawyers. Instead, the White House will push for narrowly targeted action, most of it carried out by the SEC, the Treasury Dept. , and the Labor Dept. The right outcome, Treasury Secretary Paul H. O’Neill said on Mar. 15, "depends on the Congress not legislating things that are over the top."

To O’Neill and Bush, that means enforcing current laws before passing too many new ones. Nowhere is that stance clearer than in the Andersen indictment. So the Bush Administration left the decision to Justice Dept. prosecutors rather than White House political operatives or their reformist fellows at the SEC.

By "outraged rhetoric" (Paragraph 3), the author is talking about()

A. an intense lobby blitz shown in corporate behavior

B. the indignation displayed by some congressmen

C. a decision left up to Justice Dept. prosecutors

D. the message embodied in the President’s actions

填空题