向pH为4的盐酸中加入下列物质，混合后溶液的pH可能会减小的是（ ）
A．纯水
B．氢氧化钠溶液
C．pH为4的盐酸
D．硫酸溶液
A、盐酸中加入水，酸性减弱，pH增大；
B、盐酸中加入氢氧化钠溶液时，盐酸和氢氧化钠反应，使酸性减弱，pH增大；
C、加入pH为4的盐酸时，溶液的pH不变；
D、加入稀硫酸时，如果稀硫酸的酸性比盐酸的酸性强，混合后溶液的pH会减小，如果稀硫酸的酸性比盐酸的酸性弱，混合后溶液的pH会升高；
故选D．
| Shakespeare's Birthplace and Exhibition of Shakespeare's World Welcome to the worldfamous house where William Shakespeare was born in 1564 and where he grew up. The property (房产) remained in the ownership of Shakespeare's family until 1806.The House has welcomed visitors travelling from all over the world, for over 250 years.
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| ◆Enter through the Visitors' Centre and see the highlypraised exhibition Shakespeare's World, a lively and full introduction to the life and work of Shakespeare. ◆Stand in the rooms where Shakespeare grew up. ◆Discover examples of furniture and needlework from Shakespeare's period. ◆Enjoy the traditional (传统的) English garden, planted with trees and flowers mentioned in the poet's works.   The Birthplace is within easy walking distance of all the car parks shown on the map; nearest is Windsor Street(3 minutes' walk).  The House may present difficulties but the Visitors' Centre, its exhibition, and the garden are accessible(可进入的) to wheelchair users.  The Shakespeare Coffee House(opposite the Birthplace). | |
| 1. How much is the admission for a family of two grownups and two children? | |
| A. ￡9.80. B. ￡12.00. C. ￡14.20. D. ￡16.40. | |
| 2. Where is the nearest parking place to Shakespeare's Birthplace? | |
| A. Behind the exhibition hall. B. Opposite the Visitors' Centre. C. At Windsor Street. D. Near the Coffee House. | |
| 3. A wheelchair user may need help to enter ________. | |
| A. the House B. the garden C. the Visitors' Centre D. the exhibition hall |