When evaluating different market segments, a company must pay attention to three factors. They are____.

A. company objectives and resources
B. company size
C. segment structural attractiveness
D. segment size

Bacteria will not do harm unless they get into the human body.

Some bacteria re pathogenic(致病的), _______means that they may cause disease after entering the body.

A. that
B. which
C. who
D. what

We report here a case in which the patient failed to respond to medical________.

A. interventions
B. interactions
C.interferes
D.interruptions

We put down a ______ on a house yesterday

A. certificate
B.receipt
C. recommendation
D. deposit

X-rays were discovered by a German scientist_________name was WilhemKonradRoentgen.

A. his
B.the
C. whose
D.her

The patient had appendectomy(阑尾切除术),_______means surgical removal of theappendix.

A.it
B.that
C. when
D.which

Having fully recovered after three months' stay in the ENT ward, he was______ the hospital.

A.sent into
B.charge
C.freed from
D.discharged from

Anything________is invisible to the naked eye is said to be microscopic(微小的).

A. which
B. that
C. who
D. It

It's just a(n)______medical examination, nothing to worry about.

A.routine
B.unusual
C. objective
D. subjective