【单选题】Refer to Exhibit 4-2 . Using the graph and beginning on D 1 , a shift to D 2 would indicate a(n):
C.
increase in quantity demanded
D.
decrease in quantity demanded
【单选题】下列说法正确的是( )
A.
除零族元素外,短周期元素的最高化合价在数值上都等于该元素所属的族序数
B.
已知MgCO 3 的K SP =6.82×l0 -6 ,则在含有固体MgCO 3 的MgCl 2 、Na 2 CO 3 溶液中,都有c(Mg 2+ ) =c(CO 3 2 - ),且c(Mg 2+ )·c(CO 3 2 - ) = 6.82×10 -6 mol 2 .L -2
C.
K sp (AB 2 )小于K sp (CD),说明AB的溶解度小于CD的溶解度
D.
常温下,反应C(s)+CO 2 (g)==2CO(g)不能自发进行,则该反应的ΔH>0
【单选题】Refer to Exhibit 4-2 . Using the graph and beginning on D 1 , a shift to D 0 would indicate a(n):
C.
increase in quantity demanded.
D.
decrease in quantity demanded.
【单选题】Refer to Exhibit 13-6. What quantity of output would a profit-maximizing monopolist produce?
【单选题】生产鱼糜制品为增强鱼糜制品弹性常用的凝胶化温度
【单选题】Refer to Exhibit 5-2. If a price floor of $4 is imposed, a surplus of _____units of butter will be created.
【单选题】生产鱼糜制品,为增强其弹性常用的凝胶化温度是( )
【单选题】Refer to Exhibit 4-6. A supply shift from S0 to S2 can be best explained by:
A.
input price increases.
D.
a technological advance.
【单选题】某稀硫酸和稀硝酸的混合溶液200mL,平均分成两份,向其中一份中逐渐加入铜粉,最多能溶解铜19.2g(已知硝酸只被还原为NO气体);向另一份中逐渐加入铁粉,产生气体的量随铁质量增加的变化如图所示.下列分析或结果错误的是( )
B.
OA段产生是NO,AB段反应为2Fe 3+ +Fe═3Fe 2+ ,BC段产生氢气
C.
混合液中N0 3 - 的物质的量为0.4mol
D.
c(H 2 S0 4 )为5mol?L -1
【单选题】Refer to Exhibit 13-6 What price would a monopolist charge when maximizing profits?