问题
选择题
______ a host of the show is really ___________.
A.Being, a hard work
B.To be, hard work
C.Being, work hard
D.To be, hard-working
答案
答案:B
此题重点考查动词的非谓语形式,又因work是不可数名词故选B。
______ a host of the show is really ___________.
A.Being, a hard work
B.To be, hard work
C.Being, work hard
D.To be, hard-working
答案:B
此题重点考查动词的非谓语形式,又因work是不可数名词故选B。
某温度下,H2(g)+CO2(g)
H2O(g)+CO(g)的平衡常数K=
.该温度下在甲、乙、丙三个恒容密闭容器中,投入H2(g)和CO2(g),其起始浓度如下表所示.下列判断不正确的是( )9 4
起始浓度 | 甲 | 乙 | 丙 |
c(H2)/mol/L | 0.010 | 0.020 | 0.020 |
c(CO2)/mol/L | 0.010 | 0.010 | 0.020 |
A.反应开始时,丙中的反应速率最快,甲中的反应速率最慢
B.平衡时,甲中和丙中H2的转化率均是60%
C.平衡时,乙中CO2的转化率小于60%
D.平衡时,丙中c(CO2)是甲中的2倍