用秋水仙素诱发基因突变和诱导多倍体，起作用的时期分别是（）

搜题请搜索小程序“爱下问搜题”

问题单项选择题

A．有丝分裂的间期和前期

B．有丝分裂的间期和后期

C．有丝分裂的前期和后期

D．有丝分裂的前期和后期

答案

参考答案：A

句型转换

小题1: She often does her homework at weekends. (改为一般疑问句)

________she often ______ her homework at weekends？

小题2:The children do after-school activities at 4p.m. (就划线部分提问)

______ ______ do the children do after-school activities?

小题3:My son goes to the English Club every Tuesday. (改为否定句)

My son______ ______ to the English Club every Tuesday.

小题4:The man in a white shirt is my father.(划线部分提问)

______ ______ is your father?

小题5:The little girl takes a bus to school every morning. (改为同义句)

The little girl goes to school ________ _________ every morning.

单项选择题

30岁男性，病程4个月，头痛发病，入院前出现左侧肢体无力和呕吐。入院检查，意识清，眼底视盘水肿，左上下肢肌力Ⅳ级，腱反射活跃，病理征(＋)。

根本治疗原则是

A．脱水治疗

B．给予镇痛药

C．冬眠物理降温

D．去病因治疗

E．去骨开颅减压