The scientific group is carrying out a research focused on a drug which is so _______ as to be able to change brain chemistry.
A.
powerful
B.
influential
C.
monstrous
D.
vigorous
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【简答题】EX6.2 for the circuit shown in the figure below, let V CC =5V, R s =0.5K Ω , β =120,V A =100V, R E =1K Ω ,V BE (on)=0.7V,R 1 =25K Ω ,and R 2 =50K Ω . (a) Determine the small voltage gain A vs =V o /V...