单项选择题

According to the passage, Wineland was characterized by which of the following geographical features

A．Woods only.
B．Hills only.
C．Woods and hills only.
D．Flat rocks and hills only.
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单项选择题
According to the passage, the primary benefit of the new research is that ______.
A．scientists can study the pituitary gland for the first time
B．the procedures are simpler and require fewer laboratory animals
C．the study of intact laboratory animals has now been rendered obsolete
D．researchers were able to discover prolactin
单项选择题
According to the passage, Chlamydia causes infertility in women by ______.
A．causing tissue changes which block the oviduct
B．shrinking and swelling tissues in conjunction with the menstrual cycle
C．allowing skin tissue to encyst reproductive tissue
D．necessitating abdominal surgery to remove damaged tissue
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