危险化学品分类原则？

根据内容提示完成句子。

1. He offered _________ _____ poor black people on their legal problems.

2. The last thirty years have seen the greatest number of laws stopping our ______ _____ _____,

     until today we have reached _____ ______ ______ we have almost no rights at all.

3. At 3:42 am everything began to shake. It seemed as if the world was ___ ___ ____.

4. Thousands of families were killed and many children were left _______ _____.

5.The army organized teams to dig out those who were trapped and to____ ___ ____.

化脓性脑膜炎抗生素治疗原则为()

A.选择对病原菌敏感药物

B.选择能透过血-脑脊液屏障的药物

C.早期、足量、静脉用药

D.常选两种抗生素联合用药

E.临床症状消失，即可停用抗生素

要获得一幅磁共振图像，不必要的是（）

A、受检体具有足够多的氢质子 

B、氢质子需要被磁化 

C、需要空间编码以获得细节分辨率 

D、相邻结构的质子密度需要有差异以获得对比度 

E、氢质子需要被激励 

建国初期，完成民主革命遗留任务的运动是 [ ]

A．“三反”“五反”运动

B．农业合作化

C．抗美援朝

D．土地改革

某女，42岁， * * 肿块，界限不清，经前 * * 胀痛，应首先考虑（）

A.乳疽

B.乳疬

C.乳腺增生病

D.乳岩

E.乳痨