图为高等动物进行有性生殖的3个生理过程示意图,则图中①、②、③分别为 [ ]

题型:选择题

问题:

图为高等动物进行有性生殖的3个生理过程示意图,则图中①、②、③分别为

[ ]

A.有丝分裂、减数分裂、受精作用

B.受精作用、减数分裂、有丝分裂

C.有丝分裂、受精作用、减数分裂

D.减数分裂、受精作用、有丝分裂

考点:生物个体的生长和发育
题型:选择题

此题要求改正所给短文中的错误。对标有题号的每一行作出判断:如无错误,在该行右边边横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

此行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。  

此行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。此行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。注意:原行没有错的不要改。

In this textbook, you often have to work in pair and groups.                    小题1:__________

This gives you an excellent opportunity to practice speak English.                 小题2:__________

When you work with others, be sure to say English all the time.                           小题3:__________

Change partners wherever you can so that you can practise                            小题4:__________

your English with as many classmates as possibly. Become                           小题5:__________

more aware to the number of times you speak in a group and                        小题6:__________

how much you say. Through discussions with partners and        members              小题7:__________

of groups, you not only improve your English but also developed                 小题8:__________

your communication skills, learn ways to work well in team                         小题9:__________

and benefit from other people knowledge and experience.                              小题10:__________

题型:选择题
求和:3
C1n
+9
C2n
+27
C3n
+…+3n
Cnn
=______.(n∈N*
题型:选择题

男性,65岁。上腹痛半年,体重下降 10kg,上消化道钡餐检查发现在胃小弯有一1.5cm溃疡。首选的处理是

A.胃液分析

B.手术切除溃疡

C.胃镜检查并活检

D.测空腹血清胃泌素水平

E.内科治疗一个月后复诊

题型:选择题

产后腹痛若瘀血不去,新血不生,血不归经可致()

A.产后身痛

B.恶露不下

C.产后发热

D.产后恶露不绝

E.产后大便难

题型:选择题

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