题目内容

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

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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

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