问题
判断题
入境活动物和来自动植物疫情流行国家或地区的检疫物需在合同约定的地点报检并实施检疫。( )
答案
参考答案：错
解析： 入境活动物和来自动植物疫情流行国家或地区的检疫物需在入境口岸报检并实施检疫。
搜题请搜索小程序“爱下问搜题”
入境活动物和来自动植物疫情流行国家或地区的检疫物需在合同约定的地点报检并实施检疫。( )
参考答案：错
解析： 入境活动物和来自动植物疫情流行国家或地区的检疫物需在入境口岸报检并实施检疫。
| 完形填空。 | |||
Tom and Fred were talking about the year 2050 ."What will 1 be like in the year 2050?" asked Tom. "I don't know," said Fred. "What do you think?" "Well, no one knows. But it is 2 to guess," said Tom. "In the year 2050 everybody will 3 a pocket (袖珍)computer. The computer will give people the 4 to all their problems. We shall all have telephones in our pockets, 5 . And we'll be able to talk to our friends all over the world. Perhaps we'll be able to 6 them at the same time. Machines will do 7 of the work, and people will have more 8 . Perhaps they will work Only two or three days a week. They will be able to fly to the moon by spaceship and spend their holidays there." "I'm very 9 to hear that. I hope to fly to the moon. And I hope I'll be able to live 10 ," said Fred. "Won't that be interesting? Just like a fish." | |||
| ( )1. A. our home ( )2. A. pleased ( )3. A. carry ( )4. A. news ( )5. A. either ( )6. A. call ( )7. A. most ( )8. A. work ( )9. A. sorry ( )10. A. in the sea | B. the traffic B. no use B. bring B. ways B. again B. see B. many B. duty B. glad B. on land | C. a factory C. interesting C. give C. things C. too C. look C. lot C. holidays C. sure C. on the mountain | D. the world D. unusual D. send D. answers D. also D. listen D. every D. times D. afraid D. under the ground |
同学们来到化学实验室，意外看到了一个不和谐的“音符”（如图）．由此，激发了同学们的探究欲望．
（1）同学们取该瓶中少量溶液 滴加稀盐酸，看到冒气泡，说明药品已变质，变质反应的化学方程式为：______．
[进行猜想]小天的猜想：NaOH 溶液部分变质；
你的猜想：______．
[实验探究]小天设计如下实验来验证自己的猜想，请完成下表：
| 探究目的 | 探究步骤 | 预计现象 |
| 除尽溶液中的CO32- | ①：取少量溶液于试管中，滴加足量的CaCl2试剂 | ______ |
| 证明溶液中尚存NaOH | ②：向实验①过滤后所得溶液中滴加酚酞试液 | ______ |
[实验反思]
（1）下列物质①BaCl 2溶液 ②Ca（NO3）2溶液 ③Ca（OH）2溶液 ④Ba（OH）2溶液，不能替代小天实验中CaCl 2溶液的是______（填序号）．
（2）小天第二次滴加的试剂除用指示剂外，还可以用______替代．
[拓展应用]保存NaOH 溶液的方法是______．
