问题
单项选择题
下列物质中，酸性最强的是（）。
A．HMnO4
B．H3AsO4
C．H3BO3
D．H2SO3
答案
参考答案：A
解析：
高锰酸HMnO4酸性最强。
搜题请搜索小程序“爱下问搜题”
下列物质中，酸性最强的是（）。
A．HMnO4
B．H3AsO4
C．H3BO3
D．H2SO3
参考答案：A
解析：
高锰酸HMnO4酸性最强。
| 完形填空 | ||
| Today is June lst. It is Saturday. The Clarks 1 to go to Beijing Zoo. They 2 at six thirty and have breakfastat 3 . After that 4 take the number 26 bus and 5 the zoo at nine o'clock. There are 6 animals in the zoo. The kids 7 the interesting animals The kids have a 8 day. But Mr.Clark and Mrs Clark are tired (累的) after five days' 9 . They only 10 the kids playing. The kids are very happy. At around 6:00 pm the Clarks go home. | ||
| ( )l. A. need ( )2. A. go home ( )3. A. seven o'clock ( )4. A. we ( )5. A. get to ( )6. A. little ( )7. A. buy ( )8. A. boring ( )9. A. speech ( )l0.A. watch | B. want B. have lunch B. five o'clock B. he B. join B. many B. bring B. happy B. answer B. hear | C.take C.get up C.six ten C.they C.look at C.much C.like C.difficult C.work C.look |