【单选题】电路如图所示,已知 R 1 = 5k Ω , R 2 = 15k Ω , R 3 = 10k Ω , R C = 2k Ω , R E = 2k Ω , 当电阻 R 2 不慎被短路后 ,( 如图 ), 该电路中的晶体管处于〔〕。
【单选题】设定义在R上的函数f(x)满足f(x)?f(x+2)=17,若f(1)=2,则f(2007)=( )
【单选题】The newcomers found it impossible to ______ themselves to the climate sufficiently to make permanent homes in the new country.
【判断题】严重贫血病人应用洗涤RBC进行脆性试验。
【简答题】f(n)为n 的各位数字之和,如14 +1=197,1+9+7=17,则f(14)='17.' 记f (n)=f(n),f 则f _________
【单选题】电路如图所示。 已知 R 1 =2k Ω , R 2 =18k Ω , 该电路的闭环电压放大倍数为( )。
【单选题】Newcomers When a country is under-populated, newcomers are not competitors, hut assistants. If more come they may produce not only new quotas, but a surplus as well. In such a state of things land is ...
【简答题】The newcomers found it impossible to ______ themselves to the climate sufficiently to make permanent homes in the new country. A) suit B) adapt C) regulate D) coordinate
【简答题】已知f(x)是指数函数,且f(1+ 3 )?f(1- 3 )=9,则f(2+ 17 )?f(2- 17 )的值为______.
【单选题】In the sentence 'these newcomers will be at their own expense' (Line 2, Paragraph 3), 'their' probably refers to ______.
B.
rich countries in 'first-world'
C.
many bosses, workers and politicians
D.
bosses, workers and politicians in the rich world