皮皮学，免费搜题
登录
搜题
【简答题】
登革热病毒感染蚊子后，可在蚊子唾液腺中大量繁殖，蚊子在叮咬人病毒传染给人，可引起病人发热、出血甚至休克。科学家用以下方法控制病毒的传播。将S基因转入蚊子体内，使蚊子的唾液腺细胞大量表达S蛋白，该蛋白可以抑制登革热病毒的复制。为了获得转基因蚊子，需要将携带S基因的载体导入蚊子的（）细胞。如果转基因成功，在转基因蚊子体内可检测出（）、（）和（）。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】When the applause ______, Obama continued his speech.
A.
died off
B.
died down
C.
died out
D.
died of
【单选题】When Edward, the Confessor died, the Witan chose ______as English King.
A.
William
B.
Arthur
C.
Harold
D.
Henry
【单选题】When Edward, the Confessor died, the Witan chose _________ as English King.
A.
Duke William
B.
Edith
C.
Harold
D.
Tostig
【简答题】根据下面材料，回答第 21～25 题： 第 21 题 In the first paragraph, Damien Hirst's sale was referred to as 'a last victory' because __.（ ） [A] the art market had witnessed a succession of victories [B] the auctioneer ...
【单选题】关于人身保险合同，说法有误的是( )。
A.
人身保险合同是以人的寿命和身体为保险标的的保险合同
B.
被保险人同意保险人为其订立合同的，规为投保人对被保险人具有保险利益
C.
以死亡为给付保险金条件的合同，未经被保险人书面同意认可保险金额，合同无效
D.
人身保险的受益人由被保险人或者投保人指定，投保人指定受益人时必须经被保险人同意
【单选题】阅读短文，回答 21～25 题： 第 21 题 The purpose of George Spilich's experiments is ________
A.
to test whether smoking has a positive effect on the mental capacity of smokers
B.
to show how smoking damages people's mental capacity
C.
to prove that smoking affects people's regular performance
D.
to find out whether smoking helps people's short-term memory
【简答题】Martin Luther King sought black equality by ______ but he died from violence.
【单选题】When a king died, who would typically take over the throne?
A.
His wife, the queen
B.
His firstborn son
C.
The lord
D.
His firstborn daughter
相关题目：
参考解析：
知识点：
题目纠错 0
发布
