能直接用重氮化法测定含量的是( )A.二苯胺 B.苯乙酰胺 C.苯甲胺 D.硝基苯

题型:单项选择题

问题:

能直接用重氮化法测定含量的是( )

A.二苯胺

B.苯乙酰胺

C.苯甲胺

D.硝基苯

E.苯胺

考点:西药执业药师西药执业药师
题型:单项选择题
计算:-
7
6
a3b•(
6
5
abc)
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周围神经系统的无髓神经纤维由长柱状施万细胞和()2类结构构成。

题型:单项选择题

目前,中国城市文化遗产保护面临着前所未有的冲击。一些城市为了追求经济效益最大化,不合理地要求“就地平衡”,盲目在旧城区内兴建高层建筑,使文化遗产及其环境遭到破坏。重经济效益,轻文化遗产和环境保护的选择(  )

A.是建立在错误的价值判断基础之上的

B.是坚持以经济建设为中心的必然结果

C.反映了价值判断和价值选择的历史性

D.割裂了国家、集体、个人三者的利益

题型:单项选择题

B Egyptian Villages 埃及村落

Most of the inhabitants live in mud-brick homes, their (1)  walls insulating against the afternoon heat. Flat roofs, exposed (2)  the northern evening breezes, serve as cool sleeping (3)  as well as storage areas. Villagers plaster the outer walls (4)  often trim them in blue, a color they believe (5)  off the evil eye. As a man becomes richer, (6)  can add a second story to his house perhaps (7)  his married son. Those villagers who have made the (8)  to Mecca paint the legend of their trip on (9)  outer walls of their homes. Such hajj houses, along (10)  the mosques, are the most distinguished buildings in a (11)

Some villagers build ornate pigeon coops close to their (12) , using the birds as food and their droppings to (13)  crops. Many houses still have dirt floors and lack (14)  or running water; women with jars balanced on their (15)  make the trek to the community well, and children donkeys haul the (16)  liquid in jerry cans.

All (17)  said, government sponsored building programs have also brought newer (18)  residences and utilities to some villages, particularly those outside (19)  Nile Valley in the Oases and the Red Sea (20)  areas.

16.()

题型:单项选择题

一般焊件角焊缝的装配间隙小于或等于()。

A、0.5mm

B、1mm

C、1.5mm

D、2mm

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