【多选题】以下哪些选项是淘宝卖家在进行直通车投放设置时候可以做的?
【判断题】Once you establish your main points, you need to decide the order in which you will present them.
【单选题】Once you decide to ____what you believe is right, never give up halfway.
【单选题】You have to decide the occupation you want to _______ once you graduate from college.
【单选题】已知白磷(P 4 )与CuSO 4 溶液反应的化学方程式为(Cu 3 P中P的化合价为-3价):11P 4 +60CuSO 4 +96H 2 O =20Cu 3 P+24H 3 PO 4 +60H 2 SO 4 ,则2molCuSO 4 能氧化白磷的物质的量是()
【单选题】—I’m thinking about withdraw (退出)from the committee. —Think it over. Once you decide, you won’t be ______ to the committee again.
【多选题】下列叙述中正确的是
A.
已知反应:2Cu(IO 3 ) 2 +24KI+12H 2 SO 4 =2CuI↓+13I 2 +12K 2 SO 4 +12H 2 O,其中1mol氧化剂得到11mole -
B.
向NaClO溶液中通入少量SO 2 的离子方程式为:ClO - +SO 2 +H 2 O=Cl - +SO 4 2- +2H +
C.
已知反应:14CuSO 4 +5FeS 2 +12H 2 O=7Cu 2 S+5FeSO 4 +12H 2 SO 4 ,该反应中Cu 2 S既是氧化产物又是还原产物
D.
某反应体系中的物质有:N 2 O、FeSO 4 、Fe 2 (SO 4 ) 3 、HNO 3 、Fe(NO 3 ) 3 、H 2 O,若H 2 O是生成物,则N 2 O是还原产物
【单选题】298K 时,下列反应组装成原电池,测得电动势为零,则 c(Cu 2+ ) 应为 ______ mol/dm 3 。 Ni + Cu 2+ = Ni 2+ (1mol/dm 3 )+ Cu 已知 (Cu 2+ /Cu) = 0.3419V, (Ni 2+ /Ni) = -0.257V
【简答题】已知全集U=R,集合A={x丨2-丨x丨>-3},B={x丨丨2x-3丨<11},则A∩B=_______;Cu(A∩B)=_____.
【简答题】Fill in the blanks with what you hear on the tape. Last minute Nanning travel planning can be a total nerve-wracking ___________.Start your Nanning holiday planning well _______________ will save you ...