题目内容

You should be ashamed of your _________behaviors. You bring shame to us all.

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You always think of others. It’s most ___________of you to call on me from time to time.

One of the most common sexually transmitted diseases that may lead to cervical carcinoma is caused by which of the following viruses?

A. Cytomegalovirus
B. Papillomavirus
C. Epstein-barr virus
D. Herpes simplex virus
E. Adenovirus

Kuru is a fatal disease of certain New guinea natives and is characterized by tremors and ataxia; Creutzfeldt-Jakob disease (CJD) is characterized by both ataxia and dementia. These diseases are thought to be caused by

A. Slow viruses
B. Cell wall-deficient bacteria
C. Environmental toxins
D. Prions

Mad Cow Disease has been highly publicized in Great Britain. This disease, which is similar to scrapie, is caused by

A prion
B. A virus
C. Rickettsiae
D. An autoimmune reaction
E. A bacterium with a defective cell wall