【单选题】What does the man want?
【单选题】(案例2)中国公民王先生为某大学教授,同时是甲公司(非上市公司)的股东,2019年10月取得的收入情况如下:(1)取得当月工资收入6000元、托儿补助费500元、住房补贴1000元、差旅费津贴300元;(2)价值120万元的小轿车一辆,该车所有权登记在王先生名下;(3)取得其月初购入的A上市公司股票红利0.2万元(该股票于本月28日转让);(4)将其持有的B上市公司股票(非限售股)转让,转让净收入...
【单选题】反应A(g)+B(g)—→C(g) ΔH,分两步进行:①A(g)+B(g)—→X(g) ΔH 1 ;②X(g)—→C(g) ΔH 2 。反应过程中能量变化如图所示,E 1 表示A+B—→X的活化能,下列说法正确的是
B.
X是反应A(g)+B(g)—→C(g)的催化剂
【简答题】The teacher with all his students (do) ______ long distance running in the morning.
【多选题】古人侍坐于君子,在君子作出什么举动的情况下应该主动告辞()
【简答题】A.Gas is difficult to transport over long distances. B.The system of long-distance pipelines is not available. C.Gas is not so environmentally-friendly as other fuels. D.The potential profits are far ...
【单选题】What does "hard up for cash" mean?
A.
Being born with a silver spoon in the mouth.
B.
Being born with a love of cash.
C.
Struggling with money.
D.
Working hard to earn money.
【单选题】反应A(g)+B(g)→C(g)△H,分两步进行:①A(g)+B(g)→X(g)△H 1 ②X(g)→C(g)△H 2 ,反应过程中能量变化如图所示,E 1 表示A+B→X的活化能,下列说法正确的是( )
B.
X是反应A(g)+B(g)→C(g)的催化剂
【简答题】对于某气相反应A(g)+3 B(g)+2 C(g)→D(g)+2 E(g)测得如下的动力学数据: (1)分别求出A,B,C的反应级数;(2)写出反应的速率方程;(3)若χ=6.0×10-2mol.dm-3.min-1,求该反应的速率常数。