正确答案: D

用化学试剂阻止受精后的次级卵母细胞释放极体，然后培育形成新个体

题目：为解决二倍体普通牡蛎在夏季因产卵而出现肉质下降的问题，人们培育出三倍体牡蛎。利用普通牡蛎培育三倍体牡蛎合理的方法是

解析：D

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举一反三的答案和解析：

[单选题]下列植物中，具鞭毛的绿藻是( )。

实球藻属

[单选题]导管分子的端壁形成( )。

穿孔

[单选题]在植物学上称为种子。

花生仁

[单选题]马蹄莲为天南星科著名观赏植物，其洁白的“花瓣”实为佛焰苞。( )

正确

[单选题]

mind

[单选题]硅藻分裂多代后，以产生复大孢子的方式恢复原来的大小。( )

正确

[单选题]白色体含有白色素，具有合成、储藏淀粉、蛋白质和脂类的作用，根据储藏物质的不同，它们分为造粉体、造蛋白体和造油体。( )

错误

[单选题]角苔的孢子体较发达，孢蒴长条形，基部组织有继续分生的能力，因此孢子自上而下渐次成熟。( )

正确

[单选题]回答 68 ~ 70 题：It is true that good writers rewrite and rewrite and then rewrite some more .But in order to work up the desire to rewrite ,it is important to learn to like what you write at the early stage.I am surprised at the number of famouw writers I know who say that they so dislike reading their own writing later that they even hate to look over the publishers’ opinions .One reason we may dislike reading our own work is that we’re often disappointed that the rich ideas in our minds seem very thin and plain whern first written down .Jerry Fodor and Steven Pinker suggest that this fact may be a result of how our minds work..

Many of them hate reading their own works