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【单选题】
3/4的强弱规律是A.
强弱弱
B.
弱强弱
C.
强弱强
D.
弱强强
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【简答题】设总体X具有分布律 未知,今有样本1,1,1,3,2,1,3,2,2,1,2,2,3,1,1,2 求 的最大似然估计值和据估计值.
【判断题】The use of dogs and cats in research in the U.S. decreased from 1973 to 2016 from 195,157 to 60,979, and from 66,165 to 18,898, respectively.
A.
正确
B.
错误
【简答题】Listen to the following passsge and filling the blanks: Now, the Special English program WORDS AND THEIR STORIES. Americans use many expressions with the word dog. People in the United States lov...
【单选题】F: We ought not to test the safety of new drugs on sentient animals, such as dogs and rabbits. Our benefit means their pain, and they are equal to us in the capacity to feel pain. G: We must carry out...
A.
Even though it is not necessary for people to use cosmetics, cosmetics are also being tested on sentient animals.
B.
Medical science already has at its disposal a great number of drugs and other treatments for serious illnesses.
C.
It is not possible to obtain scientifically adequate results by testing drugs in the test tube, without making tests on living tissue.
D.
Some of the drugs to be tested would save human beings from great pain.
E.
Many tests now performed on sentient animals can be performed equally well on fertilized chicken eggs that are at a very early stage of development.
【单选题】There are five basic 【C1】______ of a newspaper: to inform, to comment, to persuade, to instruct and to entertain. You may well think that this 【C2】______ of functions is in order of importance 【C3】___...
A.
elements
B.
components
C.
functions
D.
achievements
【单选题】Which of the following does the author intend to say?
A.
Dogs and cats are not good friends.
B.
Dogs are much friendlier than cats.
C.
Dogs and cats are usually good pets.
D.
Dogs use tail language more than cats.
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