阅读短文,并按要求完成1—5题。
Failure is what often happens. It is everywhere in our life. Students may fail in exams, scientists may fail in their research work, and players may fail in competitions. Although failure happens to everyone, different people’s attitudes(态度) towards failure are different.
Some people don’t think that their failure is an important thing at all. So they pay no attention to it. As a result, they will have the (A) failure later. Some people think they themselves are fools and lose their hearts in everything after they get a failure. Then they(B) their time and energy on useless things. At last, they may really be fools as they have thought.
(C)Other people are quite different from these two kinds of people mentioned above. Instead of being hopeless and lost, they draw a lesson from every failure and become more experienced. They will be successful after hard work in the end. So we should draw a lesson from every failure and become more experienced.
1题为判断正误,2补全句子,3翻译成汉语,4为回答问题;5找主题句。Failure happens to everyone. ( )
在( A )、(B)处的横线上分别填上一个单词(A) (B)
将(C)处句子译成汉语:
_______ _____________ ______________________________.Why do some people pay no attention to their failure?
________________________ .请找出第三段的主题句,写在横线上__________________________________________.
某杂交组合可产生四种表现型后代,其理论比值是3︰1︰3︰1,则这种杂交组合为
A.Ddtt×DdTt | B.DDTt×ddtt | C.DDTt×Ddtt | D.Ddtt×ddtt |
在豌豆杂交实验中,高茎与矮茎杂交,F2中高茎和矮茎的比为787︰277,上述结果的实质是
A.高茎基因对矮茎基因是显性 | B.形成配子时等位基因发生分离 |
C.控制高茎和矮茎的基因不在一条染色体上 | D.F1自交,后代出现性状分离 |
基因型为YyRr的个体,正常情况下不可能产生的配子是
A.YR | B.yR | C.Yy | D.yr |
下列性状属于相对性状的是
A.豌豆的高茎与皱粒 | B.狗的卷毛与猫的直毛 |
C.人血型的A型与B型 | D.人的长发与短发 |
下列关于细胞凋亡和细胞坏死的叙述中,错误的一项是
A.细胞凋亡是主动的,细胞坏死是被动的 |
B.细胞凋亡是生理性的,细胞坏死是病理性的 |
C.细胞凋亡是由基因调控的,细胞坏死是外界因素引起的 |
D.细胞凋亡和细胞坏死都属于细胞编程性死亡 |