问题
选择题
常温下，某溶液中由水电离的c(H＋)＝1×10－13 mol/L，该溶液可能是[ ]
①二氧化硫水溶液 ②氯化铵水溶液 ③硝酸钠水溶液 ④氢氧化钠水溶液
A．①④
B．①②
C．②③
D．③④
答案
答案：A
搜题请搜索小程序“爱下问搜题”
常温下，某溶液中由水电离的c(H＋)＝1×10－13 mol/L，该溶液可能是[ ]
①二氧化硫水溶液 ②氯化铵水溶液 ③硝酸钠水溶液 ④氢氧化钠水溶液
A．①④
B．①②
C．②③
D．③④
答案：A
| 完形填空。 | |||
| Spring Festival is the Chinese New Year's Day. It usually comes 1 February.Everyone in China 2 Spring Festival very much. When Spring Festival 3 ,Li Hong usually 4 his parents clean their house and 5 some shopping and other housework. On that 6 , everyone in China eats dumplings, New Year's cakes and other good 7 . Li Hong likes New Year's cakes. But Wang Hai says dumplings are 8 than New Year's cakes. The Chinese people _9 New Year's cakes and dumplings in their houses. How 10 _they are ! | |||
| ( )1. A. after ( )2. A. has ( )3. A. goes ( )4. A. helps ( )5. A. buys ( )6. A. morning ( )7. A. food ( )8. A. smaller ( )9. A. find out ( )10. A. happy | B. on B. like B. comes B. makes B. does B. evening B. drinks B. better B. buy B. Delicious | C. in C . remembers C. reaches C. gets C. goes C. day C. vegetables C. bigger C. eat C. lovely | D. by D. likes D. hears D. takes D. carries D. afternoon D. fruit D. sweeter D. sell D. great |