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【单选题】
The author thinks that a better way to train a dog is to ______.A.
punish him for any mistake he has made
B.
reinforce (加强) his good behavior. with a treat
C.
tolerate him no matter what he does
D.
be kind to him and not to scold him
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【单选题】________ it is very noisy in the big cities, many people ________ love living there.
A.
Although, still
B.
But, still
C.
Although, but still
【简答题】简述巨噬细胞在非特异性抗感染免疫各时相的主要作用及其作用机制。
【单选题】–How about the exhibition that day? --It was very noisy, but that didn’t ________ me.
A.
hurt
B.
impress
C.
change
D.
bother
【简答题】简述巨噬细胞在非特异性抗感染免疫各时相中的主要作用及其作用机制。
【简答题】Consider a general feedback system with parameters A=10 6 and A f =100. If the magnitude of A decreases by 20 percent, what is the corresponding percent change in A f ?
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