男，12岁，发热头痛半个月，右小腿肿痛20天，X线片示右小腿软组织肿胀，内有网状阴影，层次不清，胫骨上

A bond that is trading at par has______.

A．a price that is expressed in any whole number (no fractions)

B．a yield that is expressed in any whole number (no fractions)

C．a coupon that is expressed in any whole number (no fractions)

D．a price equal :o its face value

Which of the following is not a characteristic of people with face blindness？

A．Detecting one's facially expressed emotions.

B．Determining one's gender from one's face.

C．Judging a person is pretty or not from one's face.

D．Recalling the face of a particular person if he or she is pretty.

A、ignore some less important nonlinear factors

B、linearize the nonlinear functions around the working point

C、apply parameter concentration

D、use less function parameters

A.burnt

B.hurt

C.hit

D.shone

What kind of persons expressed their views on the events of September 11 in the passage？

A．David Owen, Joan Didion, Michael Howard and Richard Dawkins.

B．Ordinary citizens working in different fields.

C．A writer, a politician and two experts.

D．Headline writers, experts and politicians.

What is the passage mainly about？

A．How to face one's weakness.

B．Advice on choosing a career.

C．The significance of working hard at school.

D．The direct and indirect value of school work.