间接法ELISA中，形成的免疫复合物是()A．固相抗体-抗原-酶标抗体 B．固相二抗

对碳酸盐岩进行酸化增产措施常用的酸液是（）。

A.盐酸

B.土酸

C.氢氟酸

D.自生酸液

How to Beat On-line Credit-card Thieves

The Internet has led to a huge increase in credit-card fraud. Your card information could even be for sale in an illegal web site.

Web sites offering cheap services should be regarded with care. On-line shoppers who enter their credit-card information may never receive the goods they thought they bought.

The thieves then go shopping with your card number--- or sell the information over internet.

Computers hackers（黑客） have broken down security（安全） systems raising questions about the safety of cardholder information. Several months ago, 25,000 customers of CD Universe, and on-line music retailer（批发商）, were not lucky. Their name, addresses and credit-card numbers were posted on a web site after the retailer refused to pay US $157,828 to get back the information.

Credit-card firms are now fighting against on-line fraud. Master-card is working on plans for Web-only credit card, with a lower credit limit. The card could be used only for shopping on-line. However, there are a few simple steps you can take to keep from being cheated.

Ask about your credit-firm’s on-line rules. Under British law, cardholders are responsible for the first US $78 of any fraudulent spending.

And shop only at secure sites: Send your credit-card information only if the web site offers advanced secure system. If the security is in place, a letter will appear in the bottom right-hand corner of your screen. The web site address may also start the extra “s” stands for secure.

If you still have any doubt, give your credit-card information over the telephone.

Keep your password safe: Most on-line sites require a user name and password before placing an order. Treat your password with care.

小题1:What do most people worry about the Internet according to this passage?

A．fraud on the Internet

B．computer hackers

C．illegal web site

D．shopping on line小题2:How many pieces of advice does the passage give to you?

A．1

B．2

C．3

D．4小题3:You are shopping on the web and you want to buy a TV set, what does this article suggest doing?

A．You can go to the website and buy it without doubt.

B．Send your credit card information as soon as the web asks you to do so.

C．Give your credit card information over telephone if you have doubt.

D．Don’t pay money until your TV set is sent to you.小题4:Which of the following is TRUE according to the passage?

A．Computer hackers sold the retailer’s information to a web site to get money.

B．A reliable website offers you an advanced secure system.

C．You can depend on the password to protect your information.

D．The on-line credit-card thieves stole your credit-card and paid with it.

某省举行“文明城市”评比。4位评委对大家普遍看好的A、B、C等3城市获得“文明城市”称号的可能性进行了分析预测。评委甲说：“要么A市能获得，要么C市能获得。”评委乙说：“如果A市与C市能获得，则B市也能获得。”评委丙说：“只有当B市不能获得或者C市能获得时，A市才不能获得。”评委丁说：“我看B市能获得的可能性为零，而A市与C市一定能获得。”评比结束后发现，4位评委中只有一人预测成立。据此，可以推出获得“文明城市”称号的城市是（ ）

A．A市

B．B市

C．C市

D．A、B、C等3市

下列关于投资性房地产核算的表述中，不正确的是( )。

A．采有成本模式计量的投资性房地产不需要确认减值损失

B．采用公允价值模式计量的投资性房地产可转换为成本模式计量

C．采用成本模式计量的投资性房地产，符合条件时可转换为公允价值模式计量

D．采用公允价值模式计量的投资性房地产，公允价值的变动金额应计入资本公积

戒严由人民警察、人民武装警察执行，同时派出人民解放军协助执行。 ( )