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【单选题】
下列有关细胞膜受体的叙述正确的是A.
受体就是感受器
B.
能接受各自刺激并产生生理效应
C.
能与某些化学物质结合引发生理效应
D.
受体就是效应器
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举一反三
【单选题】Which of the following is NOT a reason of the failure to take preventive medical tests like a breast cancer screening?
A.
Some Americans are not willing to invest in tests that might not find any problem
B.
Doctors are often busy and cannot afford enough time on preventive medical tests.
C.
Patients and doctors do not know exactly which preventive tests are really beneficial.
D.
There is inadequate investment in equipment and the existing tests are not effective.
【简答题】If the killing continues, this wonderful animal, which took millions of years to develop, will be gone.
【单选题】The speed at which an animal lives is determined by measuring ______.
A.
the amount of food it eats
B.
its body temperature
C.
the rate at which it uses oxygen
D.
the amount of oxygen it uses
【单选题】Which of the following is not a reason that animal right activists protest against animal research?
A.
Animal research is cruel and inhumane.
B.
Animals have the right to be treated as the means to human ends.
C.
Animals have the right to be treated as beings of value in themselves.
D.
The results of animal research are unreliable due to the difference between people and animals.
【单选题】Which of the following is right?
A.
People buy animal food only at the animal food stores.
B.
Pets eat better than people.
C.
Any birds can come to the bird feeders to eat.
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