问题 选择题

下列说法正确的是[ ]

A.在101 kPa时,1molC与适量O2反应生成1 mol CO时,放出110.5 kJ热量,则C的燃烧热为110.5kl/mol

B.在101 kPa时,1molH2完全燃烧生成液态水,放出285.8 kJ热量,则H2的燃烧热为△H=+285.8 kJ/mol

C.测定HCl和NaOH的中和热时,每次实验均应测量3个温度,即盐酸起始温度、NaOH起始温度和反应的终止温度

D.在稀溶液中,OH-(aq)+H+(aq)=H2O(l) △H=-57.3kJ/mol,若将含 0.5 mol H2SO4的浓硫酸与含1 mol

NaOH的溶液混合,放出的热量等于57.3 kJ

答案

答案:C

阅读理解

阅读理解。

                                                                         News

     1) Shanghai-China's biggest city received 279,700 overseas visitors in the first quarter of the year, a 10.6

percent over last year.

      2) At 00:00 on May 8th, 1996 (Beijing time), Beijing's telephone number will be changed from seven digits

to eight digits. How to change: Add 6 in front of the old seven digits telephone numbers.

     3) Eight persons were killed and 15 badly hurt at a traffic accident in Rongxian of Sichuan on April 16th.

Sichuan Daily reported last week. The bus carrying 23 people was running from Rongxian to Shuanggu on the

morning of April 16th, when the bus failed to pass a sharp turn and fell into a field located 41 meters below the

road.

1. The traffic accident happened _______.

A. long before

B. as we expected

C. in Shanghai

D. when those people were on their way to Shuanggu

2. Li Lei's aunt lives in Beijing. Her telephone number was 6972478 before 1996. Now her

     telephone number must be ______.

A. 69724786

B. 29179966

C. 66972478

D. 69672478

3. ______, 279,700 people visited Shanghai.

A. Last week

B. From April to May

C. In the first four months of the year

D. During the first three months of the year

4. At the traffic accident, ______.

A. eight people were dead

B. twenty-three people were dead

C. thirty-one people were badly hurt

D. eight persons were badly hurt

5. The bus fell into a field. It's______ from the road to the field.

A. 16 meters long

B. 41 meters wide

C. 16 meters high

D. 41 meters deep

问答题 简答题