已知水稻体细胞中染色体数目为12对,细胞分裂后,新细胞的染色体数目为 A.24对

题型:选择题

问题:

已知水稻体细胞中染色体数目为12对,细胞分裂后,新细胞的染色体数目为

A.24对

B.24条

C.12对

D.12条

考点:细胞的生长和分裂细胞的分化动物的组织
题型:选择题

     A .drive      B. absolutely    C. construct    D. leadership     E. Policies
F.realization  G. Pressures     H.Definition    I.Challenging    J. particularly                                                               
 
Leadership is a difficult concept to explain because everyone defines it differently. From my personal experiences as a student leader, I can tell you that there is no single ___小题1:___of  leadership, ___小题2:___with students leaders. You are a leader, a student and a peer, so this role can be especially difficult to manage. As a student leader,you deal with academic__小题3:___,as well as added pressure of leading group of your peers. As, the president of  Fuse, the contemporary dance group  at Colgate University, I experienced  many ups-and-downs with___小题4:__. Thankfully, my passion for this dance club gave me the ____小题5:___to lead my fellow dancers.
Finding an activity that is both enjoyable and __小题6:___is the first step. In order to be a good leader, you must be personally interested in what you are leading, whether it's debating,cooking or robotics. In my case, dance has always been of interest to me, from my grandfather teaching me salsa to early childhood training with ballet, and so I always that dance would be part of my life. Once I arrive on my college campus, ready for my college adventure, I had a sudden ___小题7:___: wandering around the Student Activities Fair, I saw no contemporary or modern dance clubs I panicked.
After meeting a fellow dancer at Freshmen Orientation, we found that we shared the same passion and desire to start a club. We held auditions,created club____小题8:___and held practices. The process of creating the actual club was both fun and challenging because we had to figure out school club regulations, __小题9:__many club rules, obtain 60 signatures of supporters and overcome other obstacles. As it turns out, this process was not a walk in the park for us.
题型:选择题

釉质发育不全

A.牙齿发育异常

B.牙齿形态异常

C.牙齿结构异常

D.牙齿萌出异常

E.牙齿排列异常

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农村社会流动的种类,按照流动的性质可分为()

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砂轮高速旋转时,砂轮任何部分都受到(),且离心力的大小与砂轮圆周速度的平方成正比。

A.离心力作用

B.向心力作用

C.切削力作用

题型:选择题

“豆蔻”是指女子多少岁

A.十二岁

B.十三岁

C.十五岁

D.十六岁

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