水泡小，创面基底湿润、苍白、感觉迟钝（） A.I度烧伤  B.浅II度烧伤  C.深

Jerome wrote each of the integers 1 through 20, inclusive, on a separate index card. He placed the cards in a box, then drew cards one at a time randomly from the box, without returning the cards he had already drawn to the box. In order to ensure that the sum of all the cards he drew was even, how many cards did Jerome have to draw ？（）

A.19

B.12

C.11

D.10

E.3

Since life began eons ago, thousands of creatures have come and gone. Some, such as the dinosaurs, became extinct due to naturally changing ecologic conditions. More recent threats to life forms are humans and their activities. Man has drained marshes, burned prairies, dammed and diverted rivers. Some of the more recent casualties of man’’s expansion have been the dodo, great auk, passenger pigeon, Irish elk, and Steller’’s sea cow. Sadly, we can no longer attribute the increasing decline in our wild animals and plant species to "natural" processes. Many species are dying out because of exploitation, habitat alteration or destruction, pollution, or the introduction of new species of plants and animals to an area. As mandated by Congress, protecting endangered species, and restoring them to the point where their existence is no longer jeopardized, is the primary objective of the U.S. Fish and Wildlife Service’’s Endangered Species Program.

According to this passage,________

A．man is the cause of some animal extinction

B．animals often bring about their own extinction

C．Congress can absolutely end extinction of animals

D．a law is more important than human responsibility

下列哪种情况出现中性粒细胞碱性磷酸酶活性明显增高（）

A.慢性粒细胞白血病

B.类白血病反应

C.急性粒细胞白血病

D.急性非淋巴细胞白血病

E.淋巴瘤

摩尔法测定Cl^－含量时，要求介质的pH在6.5~10.0范围内，若酸度过高，则（）

A.AgCl沉淀不完全

B.AgCl沉淀易胶溶，形成溶胶

C.AgCl沉淀吸附Cl^－增强

D.Ag₂CrO₄沉淀不易形成