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【多选题】
如何挖掘农田土壤剖面及采集土壤农化样品?
A.
点数及布点：符合精度、均匀性、典型性、 代表性
B.
挖掘：不可在沟边、路边、、等；长1.5-2m、宽1m、深1.5m或地下水或母质，观察面朝阳，层土和下层土分放。
C.
土壤采集：一般采集农田混合土壤样品，采集3-5个0-20cm、20-40cm土样，按照四分法进行混合取样，写好标签，注明采样地点、时间、层次、采样人等。
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参考答案：
举一反三
【单选题】— _____ do you do to celebrate Christmas? —We have a party and give presents to each other. [     ]
A.
How
B.
Where
C.
What
D.
When
查看完整题目与答案
【单选题】Which description about informative speeches is incorrect?
A.
Informative speeches are about objects.
B.
Informative speeches are about processes.
C.
Informative speeches are about changing people’s beliefs.
D.
Informative speeches are about events.
查看完整题目与答案
【简答题】One day, a farmer was walking along a road with his son Thomas. The father said, 'Look! There's a horseshoe. Pick it up and put it in your bag.' Thomas said, 'It isn't worth the trouble.' His father s...
查看完整题目与答案
【单选题】关于《进口药材批件》叙述错误的是 ( )
A.
一次性有效批件的有效期为 1年
B.
多次使用批件的有效期为 2年
C.
国家药品监督管理局对濒危物种药材或者首次进口药材的进口申请颁发多次性有效批件
D.
《进口药材批件》编号格式为：国药材进字 +4位年号+4位 顺 序
查看完整题目与答案
【单选题】在R2624路由器发出的Ping命令中,“!”代表什么?
A.
数据包已经丢失
B.
遇到网络拥塞现象
C.
目的地不能到达
D.
成功地接受到一个回送应答
查看完整题目与答案
【单选题】关于《进口药材批件》叙述错误的是( )
A.
一次性有效批件的有效期为1年
B.
多次使用批件的有效期为两年
C.
国家药品监督管理局对濒危物种药材或者首次进口药材的进口申请颁发多次性有效批件
D.
《进口药材批件》编号格式为:国药材进字+4位年号+4位顺序
查看完整题目与答案
【简答题】听下面一段材料，回答第1至3题。 1. Where had Peter and his wife planned to spend this weekend? A. In a hotel. B. In his company. C. At home. 2. Which floor is Peter's office on? A. 8th. B. 10th. C. 12th. 3. What did...
查看完整题目与答案
【单选题】关于《进口药材批件》叙述错误的是(
A.
一次性有效批件的有效期为1年
B.
多次使用批件的有效期为2年
C.
国家药品监督管理局对濒危物种药材或者首次进口药材的进口中请颁发多次性有效批件
D.
《进口药材批件》编号格式为:国药材进字+4位年号+4位顺序
查看完整题目与答案
【简答题】C The house where I lived before was near a railway station. I had become so familiar with the sound and sight that I took little interest 1. ________ them. However, when my father decided to take up ...
查看完整题目与答案
【简答题】短文填空：选择恰当的单词填空，每词限用一次。（有两个多余的选项） when  their  even  feel  behave or modern  hours  speak  classical Where did you go yesterday? Did you hear music at any of these places? Today most stores and restaur...
查看完整题目与答案
相关题目：
【单选题】— _____ do you do to celebrate Christmas? —We have a party and give presents to each other. [     ]
A.
How
B.
Where
C.
What
D.
When
查看完整题目与答案
【单选题】Which description about informative speeches is incorrect?
A.
Informative speeches are about objects.
B.
Informative speeches are about processes.
C.
Informative speeches are about changing people’s beliefs.
D.
Informative speeches are about events.
查看完整题目与答案
【简答题】One day, a farmer was walking along a road with his son Thomas. The father said, 'Look! There's a horseshoe. Pick it up and put it in your bag.' Thomas said, 'It isn't worth the trouble.' His father s...
查看完整题目与答案
【单选题】关于《进口药材批件》叙述错误的是 ( )
A.
一次性有效批件的有效期为 1年
B.
多次使用批件的有效期为 2年
C.
国家药品监督管理局对濒危物种药材或者首次进口药材的进口申请颁发多次性有效批件
D.
《进口药材批件》编号格式为：国药材进字 +4位年号+4位 顺 序
查看完整题目与答案
【单选题】在R2624路由器发出的Ping命令中,“!”代表什么?
A.
数据包已经丢失
B.
遇到网络拥塞现象
C.
目的地不能到达
D.
成功地接受到一个回送应答
查看完整题目与答案
【单选题】关于《进口药材批件》叙述错误的是( )
A.
一次性有效批件的有效期为1年
B.
多次使用批件的有效期为两年
C.
国家药品监督管理局对濒危物种药材或者首次进口药材的进口申请颁发多次性有效批件
D.
《进口药材批件》编号格式为:国药材进字+4位年号+4位顺序
查看完整题目与答案
【简答题】听下面一段材料，回答第1至3题。 1. Where had Peter and his wife planned to spend this weekend? A. In a hotel. B. In his company. C. At home. 2. Which floor is Peter's office on? A. 8th. B. 10th. C. 12th. 3. What did...
查看完整题目与答案
【单选题】关于《进口药材批件》叙述错误的是(
A.
一次性有效批件的有效期为1年
B.
多次使用批件的有效期为2年
C.
国家药品监督管理局对濒危物种药材或者首次进口药材的进口中请颁发多次性有效批件
D.
《进口药材批件》编号格式为:国药材进字+4位年号+4位顺序
查看完整题目与答案
【简答题】C The house where I lived before was near a railway station. I had become so familiar with the sound and sight that I took little interest 1. ________ them. However, when my father decided to take up ...
查看完整题目与答案
【简答题】短文填空：选择恰当的单词填空，每词限用一次。（有两个多余的选项） when  their  even  feel  behave or modern  hours  speak  classical Where did you go yesterday? Did you hear music at any of these places? Today most stores and restaur...
查看完整题目与答案
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