【单选题】A demand curve of a normal good
C.
is a graph of the relationship between quantity demanded of a good and its price.
D.
Both answers B and C are correct.
E.
Both answers A and C are correct.
【简答题】电路如下图 所示,晶体管的 β =60 , U BEQ ≈0.7V , r be ≈1k Ω 。 (1)基极的静态电流计算公式是( ) A B C (2)三极管集射两极的静态电压计算公式是( ) D E F (3)设 ,则放大倍数Au的计算公式是( ) G H I (4)输入电阻的计算公式为( ) J R i =R b //[r be +(1+ β )R e ] K R i =R b...
【单选题】If a good is "normal," then an increase in income will result in
A.
no change in the demand for the good.
B.
an increase in the demand for the good.
C.
a decrease in the demand for the good.
【单选题】p:a是2的倍数,q:a是4的倍数,则p是q的
【单选题】用(a,b)表示a,b两数的最大公约数,[a,b]表示a,b两数的最小公倍数,例如(4,6)=2,(4,4)=4.[4,6]=12,[4,4]=4,设a,b,c,d是不相等的自然数,(a,b)=P,(c,d)=Q,[P,Q]=X;[2,6]=M,[c,d]=N,(M,N)=Y.则( )
【简答题】(15分) M、N、O、P、Q是元素周期表中原子序数依次递增的前四周期元素。M原子最外层电子数为内层电子数的3倍;N的焰色反应呈黄色;O的氢化物是一种强酸,其浓溶液可与M、Q的化合物反应生成O的单质;P是一种金属元素,其基态原子中有6个未成对电子。请回答下列问题: (1)元素Q的名称为__________,P的基态原子价层电子排布式为__________ 。 (2)O的氢化物的沸点比其上一周期同族...
【单选题】Which of the following would most likely cause a decrease in the current demand for a normal good?
A.
An increase in the price of the good.
B.
An increase in the expected future price of the good.
C.
A decrease in the price of a complement for the good.
D.
None of the above would be likely to cause a decrease in current demand for a normal good.
【简答题】Do you have a ____? 您有预定吗? 2. How long will you be ____, please? 您准备住多久? 3. How would you like to ____, please? 请问您用什么方式付款? 4. Could you ____ your name here, please? 能在这儿签名吗? 5. May I see your ____? 可...
【判断题】项目组织具有临时组合性特点,是一次性的、暂时性的。