题干

下表为3个不同小麦杂交组合及其子代的表现型和植株数目。
组合
序号
杂交组合类型
子代的表现型和植株数目
抗病
红种皮
抗病
白种皮
感病
红种皮
感病
白种皮
一
抗病、红种皮×感病、红种皮
416
138
410
135
二
抗病、红种皮×感病、白种皮
180
184
178
182
三
感病、红种皮×感病、白种皮
140
136
420
414
据表分析,下列推断错误的是

A:6个亲本都是杂合体

B:抗病对感病为显性

C:红种皮对白种皮为显性

D:这两对性状自由组合

上一题 下一题 0.0难度 选择题 更新时间:2018-04-28 01:36:06

答案(点此获取答案解析)

B

同类题2

阅读理解

    On a recent visit to the Museum of Modem Art with a friend and her daughter,wandering through the museum's exhibits,I was struck by how often my friend's 13-year-old daughter asked us to take photos of her with her smart phone in front of the artwork.Then,she gazed at the photos which she would then post on Instagram,Snapchat and all the rest.She was not the only person who was doing this; it seemed everyone was busy taking photos of themselves "experiencing" the museum.

    This is by no means a criticism of my friend's daughter or anyone else.What was concerning,at least to me,was that in between being photographed and posting,my friend's daughter had no interest in the artwork,a fact which didn't seem to matter or have anything to do with wanting to post herself as someone enjoying the experience.

    When I was her age,I had no interest in going to museums either.Having no interest in art at her age (and any age) is completely normal.But what is disturbing is how much of a young person's energy these days goes into creating an image of the life they're living and the character they "are" in that life.While creating a self-image has always been a big part of growing up and figuring out our identity,social media seems to have changed the rules of the game.Social media has not just increased the pressure and possibility of creating a self-generated(自我创造的)  self-image,but also distorted(歪曲)the process through which we become who we are.Young people now seem to be creating an image of who they are in place of becoming who they are,posting their life rather than living it.

    Social media has turned life and its experiences into an exercise in narcissism(自恋,自我陶醉).No matter what the experience is actually about,it becomes about you,the person who is living it.A concert is not about the music,a restaurant not about the food and a sport event not about the sport;it's all about you,the doer,and what the event says about you.As a result the more we use life create an identity,the more distant from life we feel.Instead of being part of it,we feel as if we have to keep generating new life material.

    I hope the next time you post your story,pause for a moment and experience where you are,feel what it feels like to live what you're living without using life for your benefit,or for anything at all.Just live,without the narrative(叙述).While you may feel this practice is a threat to your identity,causing you to miss a chance to prove your value,in fact,the benefit will far outweigh any loss it brings.