问题
填空题
给音节标声调。
（xiao he）小河 （xue xiao）学校 （xiao yuan）校园 （fei ji）飞机
答案
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给音节标声调。
（xiao he）小河 （xue xiao）学校 （xiao yuan）校园 （fei ji）飞机
xiǎo hé xué xiào xiào yuán fēi jī
| 选词填空。 | |
2. One ______ not ______ cross the street against the traffic rules. 3. The workers are doing all they can to ______ the accident rate. 4. She ______ because she was on a diet. 5. He is heavily ______. 6. I'll see the film ______. 7. The teacher ______ by teaching. 8. Tom was very angry and ______ me. 9. She ______ a lot of ______ last winter. 10. Don't ______ when you are late for school. |
已知某盐在不同温度下的溶解度如下表所示，若把溶质的质量分数为22%的该盐溶液由50℃逐渐冷却，则开始析出晶体的温度范围是（ ）
| 温度（℃） | 0 | 10 | 20 | 30 | 40 |
| 溶解度（g） | 11.5 | 15.1 | 19.4 | 24.4 | 37.6 |
A．30℃-40℃
B．20℃-30℃
C．10℃-20℃
D．0℃-10℃