题干


He is ____ China Daily. In other words, he works ______ China Daily.

A:on; for

B:for; o

C:in; at

D:at; o

上一题 下一题 0.0难度 选择题 更新时间:2016-03-03 02:25:40

答案(点此获取答案解析)

A

同类题4

完形填空

    My husband Jeff and I moved into our new home in Scottsbluff last year just before Christmas. I did not have the 1 or energy to carry out my traditional Christmas decorating and baking activities. What was the point, anyway? It was going to be a 2 Christmas after all.

    3, the neighborly nature of west Nebraska residents started to trickle (陆续来临) in.

    There was a 4on the door one evening. It was Jeff's new colleague, John Smith, and his wife, Phyllis. The Smiths had stopped by to 5 us with a loaf of homemade bread. They pointed out a 6 on the porch (门廊). Apparently the doorbell wasn't working in the cold snowy weather and we had 7 a visit from the Browns, our across-the-street neighbors, who brought us a Christmas card and more Christmas cookies.

    The 8 feelings brought by these thoughtful gestures lasted longer than the food.

    As Jeff and I were9 pre-Christmas snow from our driveway, Ernie Guzman came over from next door to 10 us to dig out.

    Then, we received an invitation to 11 a Christmas Eve meal with our neighbors, Ernie and Nancy Sommer, and their 12—a 90-year-old lady, who also had no family in the immediate area with whom to spend the holiday.

    Our Christmas Eve was quite merry, thanks to our 13. Our Christmas morning 14 was special, thanks to the Smiths' gift of bread. I was so 15 for these gestures of welcome, especially during the holidays.

    This year, we were again unable to be with our families for Christmas. The 16 and work schedules just made things too difficult. 17 that sense of Christmas isolation (孤立) all too well, we decided to try to round up some other folks who were 18 in the holidays.

    Lonely people are all around us, but most of us 19 notice them. Just take a look around you. Sometimes, the smallest 20 gesture can make a world of difference.

同类题5

合成氨工业对国民经济和社会发展具有重要的意义.其原理为:

N2(g)+3H2(g)⇌2NH3(g)△H=﹣92.4kJ/mol   据此回答以下问题:

(1)合成氨工业采取的下列措施中,不能用勒沙特列原理解释的是____ (填序号).

①反应压强为20Mpa~50Mpa   ②500℃的高温    ③铁触媒作催化剂   ④将生成的氨液化并及时从体系中分离出来,未反应的N2、H2循环到合成塔中.

(2)一定条件下NH3的平衡体积分数随n(N2)变化如图所示(T﹣温度).则T2____ T1(填>、=、<),判断的依据是:____ 

(3)合成氨气所需的氢气可以由水煤气分离得到.涉及反应信息如下:

反应一:C(s)+H2O(g)⇌H2(g)+CO(g)   平衡常数K1

反应二:CO(g)+H2O(g)⇌H2(g)+CO2(g)  平衡常数K2

①K1的表达式:K1= ____ . 

②将一定量的H2O(g)和CO(g)分别通入到体积为1L的密闭容器中,在不同条件下进行反应,得到以下三组数据:

实验组别

温度/℃

起始量/mol

平衡量/mol

达到平衡所需时间/min

H2O

CO

H2

CO

1

650

1

2

0.8

1.2

5

2

900

0.5

1

0.2

0.8

3

3

T

a

b

c

d

t

(Ⅰ)实验1中,用CO2表示反应开始到平衡的平均反应速率为____ 

(Ⅱ) 在实验3,当a=0.5、b=1时,要使c、d数据与实验2相同,且t<3,可以采取的措施为____ (填序号)

A.其它条件不变温度T<900℃B.其它条件不变温度T>900℃

C.充入一定量氖气                    D.使用高效催化剂

(Ⅲ)对于反应二,当升高温度时K2____ (填“增大”、“减小”或“不变”).