从货币发展的历史来看，最早的货币形式是铸币。

Reading helps employers deal with different opinions and finally make ()decisions.

A、circumspect

B、circumstance

C、spectrum

D、instance

A．It is proved to be efficient in helping employers make decisions.

B．All companies in U. S. are monitoring their employees at work.

C．It is undoubtedly helpful to reward those who are helpful.

D．The practice can be run cheaply and efficiently by the employers.

The main idea of the text is to

A．call on the employers to enable the disabled employees.

B．introduce some useful equipment for those disabled staff.

C．criticize those who don't do anything for their disabled employees.

D．suggest the employers to make advantage of various technologies.

Why is it important for employers to take stress seriously？

A．The law requires them to make their workplaces stress-free.

B．Reducing stress can be very expensive.

C．Ignoring stress in employees may be expensive for the organization.

D．Stressed workers complain a lot.

Why did Meyer initiate the debate between him and Woese as he claimed？

A．To make it possible the alternative use of the vocabulary of science.

B．To reconcile what appear to be two contradictory scientific views.

C．To claim victory for the views which are so significant.

D．To establish the soundness of a discussion that's been long suppressed.

Why did Meyer initiate the debate between him and Woese as he claimed？

A．To make it possible the alternative use of the vocabulary of science.

B．To reconcile what appear to be two contradictory scientific views.

C．To claim victory for the views which are so significant.

D．To establish the soundness of a discussion that's been long suppressed.

What does the professor imply about making mistakes？

A．You should try not to make any mistakes.

B．It is dangerous to make mistakes in chemistry．

C．Mistakes can be a part of the learning process．

D．Professional chemists rarely make mistakes．

A．highly educated through TV and radio

B．well protected by the government

C．highly paid by the employers

D．well informed by the media

What does the professor imply about making mistakes？

A．You should try not to make any mistakes.

B．It is dangerous to make mistakes in chemistry．

C．Mistakes can be a part of the learning process．

D．Professional chemists rarely make mistakes．

According to the passage, privacy is like health in that______.

A．people will make every effort to keep it.

B．its importance is rarely understood

C．it is something that can easily be lost

D．people don't cherish it until they lose it