用正丁醇将皂苷类成分从水溶液中分离出来的方法是 A.大孔吸附树脂 B.凝胶过滤法 C

题型:单项选择题

问题:

用正丁醇将皂苷类成分从水溶液中分离出来的方法是

A.大孔吸附树脂
B.凝胶过滤法
C.硅胶色谱法
D.液-液萃取法
E.聚酰胺

考点:中药执业药师中药学专业知识(二)中药执业药师中药学专业知识(二)
题型:单项选择题

关于葡萄球菌,错误的是

A.均可致病

B.无芽胞

C.抵抗力强

D.引起化脓性感染

E.营养要求不高

题型:单项选择题

对于掉电的处理,8086/8088是通过( )来完成的。

A.软件中断

B.可屏蔽中断

C.非屏蔽中断

D.DMA

题型:单项选择题

主要用煎煮法制备的是()

A.煎膏剂

B.酊剂

C.茶剂

D.流浸膏剂

E.酒剂

题型:单项选择题

一国政府在对本国居民的境内境外所得汇总征税时,允许在其应纳税额中扣除境外的已纳税款,只就其差额缴税,这种避免国际重复征税的办法称为( )。

A.免税法

B.扣除法

C.扣税法

D.抵免法

题型:单项选择题

Press Photographers


Good press photographers must have an "eye" for news, (26) journalists must have a "nose" for a good story. They must be able to interpret a story and decide rapidly how they can take (27) of the best opportunities to take pictures. The most difficult part of a press photographer’s job is that he or she has to be able to (28) a complicated situation with just one photograph. They rarely have second (29) and must be able to take the required (30) very quickly. Indeed, speed is essential — if the photographs are not (31) for the printing deadline, they are very unlikely to be of any (32) .
Most press photographers begin (33) with a local newspaper. There, the (34) is mostly for material of regional interest. Photographers may be expected to photograph a lot of unexciting events but to (35) the enthusiasm to put "something special" into every picture.
There is (36) competition among those who want to move from local to national newspapers. Here, the work is much more centered on news. The photographer must work (37) greater pressure and (38) more responsibility. Only (39) reliable, talented and resourceful photographers (40) this difficult move. The work is tough and can be (41) . On an overseas assignment, photographers may have to (42) unfamiliar food and accommodation, physical and mental stress, and (43) difficulty in transporting the pictures from an isolated area to get them to the newspaper (44) They also have to (45) the competition from other publications.

A. passB. make C. turn D. proceed

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