皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【简答题】
作为基因的运输工具 —— 载体 , 必须具备的条件之一及理由是 ( ) A. 能够在受体细胞中稳定地保存下来并大量复制 ， 以便提供大量的目的基因 B. 具有多个限制酶切割位点 ， 以便于目的基因的表达 [来源 :Z+xx+k.Com] C. 具有某些标记基因 ， 以便为目的基因的表达提供条件 D. 能够在受体细胞中复制并稳定保存 ， 以便筛选
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【单选题】等渗缺水伴酸中毒患者,在补充碱性溶液纠正酸中毒后,可能发生
A.
低氯
B.
低钠
C.
低镁
D.
低钾
E.
低碳酸氢根
查看完整题目与答案
【单选题】等渗缺水伴酸中毒患者,在补充碱性溶液纠正酸中毒后,可能发生
A.
低钠
B.
低钾
C.
低氯
D.
低镁
查看完整题目与答案
【单选题】Welcome to England! The weather of England changes all the time. It doesn't snow very often, but it can be rainy, sunny, cloudy, windy, foggy or cold at any time of year. If it's raining when you get ...
A.
There is lots of snow.
B.
It can be rainy for a whole day.
C.
The west of England is hotter than the east.
D.
The weather changes a lot during a day.
查看完整题目与答案
【简答题】Read and complete the following sentences. 1. The heat is killing me. The ______ weather makes me lazy so that I don ’ t want to go out. 2 . It'll probably _____ this afternoon. It’s nice to see the s...
查看完整题目与答案
【简答题】It is well known that the English go out with an umbrella or a raincoat. Why? (21)_____ the weather in Britain often changes quickly. It is not very usual for the same kind of weather to (22) ______ l...
查看完整题目与答案
【单选题】—___ weather it is! We can’ t go boating on the Xuanwu Lake. —Don’t worry. Let’ s go to the Science Museum instead.
A.
What good
B.
How good
C.
How bad
D.
What bad
查看完整题目与答案
【单选题】Give the weather forcast for the city you chose in answer 1.
A.
Today in New Delhi it is sunny . The current Temperature is 24 degrees Celsius. The high for today is 24 degrees And the low is 17 degrees. Tomorrow there will be sunny weather.
B.
Today in Brazzaville it is mostly cloudy. The current Temperature is 32 degrees Celsius. The high for today is 33 degrees And the low is 25 degrees. Tomorrow there will be stormy weather.
C.
Today in South Africa it is partly cloudy. The current Temperature is 21 degrees Celsius. The high for today is 22 degrees And the low is 17 degrees. Tomorrow there will be partly cloudy weather.
D.
Today in Moscow it is snowing. The current Temperature is 2 degrees Celsius. The high for today is 2 degrees And the low is -5 degrees. Tomorrow there will be rainy weather.
查看完整题目与答案
【简答题】选择正确的句子进行搭配 1 、 Nice to meet you. 2 、 Thank you very much! 3 、 Where are you from? 4 、 What is the temperature in Shanghai? 5 、 How much is the shirt? 6 、 May I have your name? 7 、 What size do you wa...
查看完整题目与答案
【多选题】适用于硫代乙酰胺法检查重金属的药物是（　　　）。　
A.
溶于稀酸者
B.
不溶于水者
C.
不溶于乙醇者
D.
供试液澄清、无色者
查看完整题目与答案
【单选题】下列哪种方法适用于药物中铁盐的检查
A.
白田道夫法
B.
巯基醋酸法
C.
Ag-DDC法
D.
硫代乙酰胺法
E.
都不适用
查看完整题目与答案
相关题目：
【单选题】等渗缺水伴酸中毒患者,在补充碱性溶液纠正酸中毒后,可能发生
A.
低氯
B.
低钠
C.
低镁
D.
低钾
E.
低碳酸氢根
查看完整题目与答案
【单选题】等渗缺水伴酸中毒患者,在补充碱性溶液纠正酸中毒后,可能发生
A.
低钠
B.
低钾
C.
低氯
D.
低镁
查看完整题目与答案
【单选题】Welcome to England! The weather of England changes all the time. It doesn't snow very often, but it can be rainy, sunny, cloudy, windy, foggy or cold at any time of year. If it's raining when you get ...
A.
There is lots of snow.
B.
It can be rainy for a whole day.
C.
The west of England is hotter than the east.
D.
The weather changes a lot during a day.
查看完整题目与答案
【简答题】Read and complete the following sentences. 1. The heat is killing me. The ______ weather makes me lazy so that I don ’ t want to go out. 2 . It'll probably _____ this afternoon. It’s nice to see the s...
查看完整题目与答案
【简答题】It is well known that the English go out with an umbrella or a raincoat. Why? (21)_____ the weather in Britain often changes quickly. It is not very usual for the same kind of weather to (22) ______ l...
查看完整题目与答案
【单选题】—___ weather it is! We can’ t go boating on the Xuanwu Lake. —Don’t worry. Let’ s go to the Science Museum instead.
A.
What good
B.
How good
C.
How bad
D.
What bad
查看完整题目与答案
【单选题】Give the weather forcast for the city you chose in answer 1.
A.
Today in New Delhi it is sunny . The current Temperature is 24 degrees Celsius. The high for today is 24 degrees And the low is 17 degrees. Tomorrow there will be sunny weather.
B.
Today in Brazzaville it is mostly cloudy. The current Temperature is 32 degrees Celsius. The high for today is 33 degrees And the low is 25 degrees. Tomorrow there will be stormy weather.
C.
Today in South Africa it is partly cloudy. The current Temperature is 21 degrees Celsius. The high for today is 22 degrees And the low is 17 degrees. Tomorrow there will be partly cloudy weather.
D.
Today in Moscow it is snowing. The current Temperature is 2 degrees Celsius. The high for today is 2 degrees And the low is -5 degrees. Tomorrow there will be rainy weather.
查看完整题目与答案
【简答题】选择正确的句子进行搭配 1 、 Nice to meet you. 2 、 Thank you very much! 3 、 Where are you from? 4 、 What is the temperature in Shanghai? 5 、 How much is the shirt? 6 、 May I have your name? 7 、 What size do you wa...
查看完整题目与答案
【多选题】适用于硫代乙酰胺法检查重金属的药物是（　　　）。　
A.
溶于稀酸者
B.
不溶于水者
C.
不溶于乙醇者
D.
供试液澄清、无色者
查看完整题目与答案
【单选题】下列哪种方法适用于药物中铁盐的检查
A.
白田道夫法
B.
巯基醋酸法
C.
Ag-DDC法
D.
硫代乙酰胺法
E.
都不适用
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题