分解因式: (1)a2﹣25b2=(); (2)ab2﹣4ab+4a=()。

题型:填空题

问题:

分解因式:

(1)a2﹣25b2=(    );

(2)ab2﹣4ab+4a=(    )。

考点:因式分解
题型:填空题

按3红、4蓝的顺序挂彩球。如果有16个蓝色彩球,要配(    )个红色彩球。

题型:填空题

先天性肾缺如又称()

A.特发性肾病

B.融合肾

C.重复肾

D.肾发育不全

E.游走肾

题型:填空题

About a week ago, when I was playing basketball at our local park, I noticed a small group of boys picking on a smaller, skinnier boy. They were (21) him names and even pushed him to the ground and kicked dirt in his face. (22) I saw that, I walked over to the group.
I stepped (23) them and the smaller boy, and asked them politely what this boy had done worthy of (24) they were doing to him. One of the boys replied, "He’s weird. " At that, I asked one of the boys if he thought his friend was weird, and the (25) was "No." So, I asked another boy what the word "weird" (26) , and he said, "Different." That was my cue (暗示). I told them that everyone is (27) , and that they all looked just as different to the other boy as he did to them. They all stood (28) for a moment, and then the most amazing thing happened. One of the boys helped the small boy off the ground and then said sorry to him. He (29) to let him play with them.
I thanked the boy for being so (30) As I looked around, I realized that there were dozens of other people at the park (31) no one else had stopped to help this boy. I felt happy that the boy was p enough to stand up against his friends to (32) someone in need, but I felt sad that (33) else had even taken a second look.
I hope that my action helped them (34) that they could have made a difference with a little (35) , and maybe next time they will be the ones who choose to help.

Ⅱ. 完形填空

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通过下面短文,掌握其大意,然后再各题所给的四个选项(A、B、C和D)中选出一个最佳选项。

A.proud

B.clever

C.honest

D.patient

题型:填空题

唐中宗李显被其母(武则天)废黜后,受封为什么?

题型:填空题

有关免疫细胞的说法,正确的是()

A.记忆细胞再次受到相同抗原的刺激后都能迅速产生抗体

B.B细胞、T细胞和浆细胞受到刺激后都能不断进行分裂

C.一个浆细胞内的基因数目与其产生的抗体数量是相同的

D.浆细胞的寿命比记忆B细胞短且所含的内质网相对发达

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