[简答题]When can procedures subjecting animals to distress be used

[单项选择]Some animals apparently can resist cancer by strengthening their immune system in preparation for winter, Johns Hopkins researchers said on Wednesday.
The scientists said their study is the first to show that the central nervous system, reacting to environmental changes, may spark changes in the body’s immune system that control the growth of tumors.
They said if that is the ease, a better understanding of how the process works eventually could lead to new cancer treatments.
Dr. Randy Nelson, an associate professor of psychology at Hopkins, stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day, the animals’ immune system and cancer. More work also would be needed to show that the findings could be applied to human cancer.
Dr. Faye Austin, an immunologist with the National Cancer Institute in Bethesda, said: "It’s a very intriguing observation that the length of exposure t
A. the findings of animals’ resistance to cancer can be applied to human cancer treatments
B. the length of exposure to light can affect the growth of a tumor
C. there is a relation between the length of the day, the animals’ immune system and cancer
D. there is a new approach for studying the function of central nervous system in the body’s immune system

[填空题]Animals can be made to do both when the activity of certain genes is doubled.

[单项选择]
How many animals can the woman see

[单项选择]How many animals can the man see
A. Seven.
B. Three.
C. Four.

[单项选择]When can I go to see her
A. On weekends.
B. Whenever I want.
C. Anytime except weekends.
D. When she wants to see me.

[单项选择]When can the woman get her photos
A. Early in the morning.
B. At lunch time.
C. In the evenin

[单项选择]
When can the woman get the computer
A. On Wednesday.
B. On Tuesday.
C. On Thursday.
D. On Sunday.

[单项选择]How many animals can the man seeHow many animals can the man see
A. Seven.
B. Three.
C. Four.

[单项选择]When can the woman see the new book
A. Next week.
B. Today.
C. Tuesday.