题干

针对人的舌头能否向中间卷曲这一性状,小乐同学对家人进行了调查,其结果如表.以下推理错误的是(  )

祖父

祖母

姑姑

爸爸

妈妈

小乐

未出生的弟妹

能卷舌

能卷舌

能卷舌

不能卷舌

能卷舌

不能卷舌

?

A:能卷舌是显性性状,受显性基因控制

B:姑姑和妈妈的基因组成完全相同

C:小乐与妈妈性状表现不同是变异现象

D:未出生的弟妹能卷舌的概率是50%

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答案(点此获取答案解析)

B

同类题1

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Moving into a new home in a new neighborhood is an exciting experience. Of course, you want to make sure that you become an accepted and valuable part of your new neighborhood. The easiest way to accomplish this is to make sure you conduct yourself as a good neighbor should.____

    Perhaps one of the most important things you can do as a good neighbor is to keep your property(房产) neat, clean, and in good repair. ____By choosing to keep the outside of the home in great shape, you will help to improve the look and feel of the area.

    Second, take the overall appearance of the neighborhood seriously. When going for a walk. Take along a small garbage bag. ____This small act will let your neighbors know that you care about the area.

    ____ If a neighbor is going to be out of town, offer to collect mail and newspapers. If a neighbor suffers an illness, offer to do the grocery shopping. Let them know you are there to help in any way this acceptable, while still respecting the privacy of your neighbor.

    ____By following the basic rules of respecting others, taking care of what belongs to you, and taking pride in the appearance of the neighborhood in general, you will quickly become a good neighbor that everyone appreciates.

A. In general, keep an eye on their property while they are gone.

B.A good neighbor is also one who likes to help out in small ways.

C. Being a good neighbor is more or less about considerate behavior.

D. Sometimes neighbors may go to the supermarket together to do shopping.

E. Should you come across waste paper thrown out of a passing car, pick it up.

F. People tend to lake pride in keeping everything in their street fresh and inviting.

G. Here are a few tips to help you win over everyone in the neighborhood quickly

同类题5

阅读下面的文言文,完成下题。

      马仙琕字灵馥,扶风郿人也。仙琕少以果敢闻。遭父忧,毁瘠过礼,负土成坟。随齐安陆王萧缅。缅卒,事明帝。永元中,萧遥光、崔慧景乱,累有战功,以勋至前将军。会寿阳新陷,魏将王肃侵边,仙琕力战,以寡克众,魏人甚惮之。

     义师起,四方多响应,高祖使仙琕故人姚仲宾说之,仙琕于军斩仲宾以徇。义师至新林,仙琕犹持兵于江西,日抄运漕。建康城陷,仙琕号哭经宿,乃解兵归罪。高祖劳之曰:“射钩斩袪①,昔人弗忌。卿勿以戮使断运苟自嫌绝也。”仙琕谢曰:“小人如失主犬,后主饲之,便复为用。”高祖笑而美之。俄而仙琕母卒,高祖知其贫,赙给甚厚。仙琕号泣,谓弟仲艾曰:“蒙大造之恩,未获上报,今复荷殊泽,当与尔以心力自效耳。”

     天监四年,王师北讨,仙琕每战,勇冠三军,当其冲者,莫不摧破。与诸将论议,口未尝言功。人问其故,仙琕曰:“大丈夫当进不求名,退不逃罪,乃平生愿也,何功可论!”

     十年,朐山民杀琅邪太守刘晣,以城降魏,诏假仙琕节,讨之。魏徐州刺史卢昶以众十馀万赴焉。仙琕与战,累破之,昶遁走。仙琕纵兵乘之,魏众免者十一二,振旅还京师,迁太子左卫率。十一年,迁豫州刺史,领南汝阴太守。

     初,仙琕幼名仙婢,及长,以“婢”名不典,乃以“玉”代“女”,因成“琕”云。自 为 将 及 居 州 郡 能 与 士 卒 同 劳 逸 身 衣 不 过 布 帛 所 居 无 帏 幕 衾屏 行 则 饮 食 与 厮 养 最 下 者 同 其在边境,常单身潜入敌庭,伺知壁垒村落险要处所。故战多克捷,士卒亦甘心为之用,高祖雅爱仗之。在州四年,卒。赠左卫将军,谥曰刚。

(选自《梁书》,有删改)

注①“射钩斩袪”:是关于春秋五霸中齐桓公和晋文公的典故,用来借代英明君主的不计前嫌。