求助GWD中的一道逻辑题

ms357408

Telomerase is an enzyme that is produced only in cells that are actively dividing. For the reason it is generally absent from body tissues in adults. Boen marrow is an exception to this rule, however, since even in adults, bone marrow cells continually divide to replace old blood cells. Cancers are another exception, because their cells are rapidly dividing.
The information provided most strongly supports which of the following?

A. Telomerase is the only enzyme that is present in cancerous cells but absent  from cells that are not actively dividing.

B. In children, the only body tissues from which telomerase is absent are those in which cells are not rapidly dividing.

C. The presence of telomerase in bone marrow is no indication of bone marrow cancer.

D. Cancer of the bone marrow develops more rapidly than cancer growing in any ogher kind of adult tissue.

E. The level of telomerase production is always higher in cancerous tissue than in noncancerous tissue.

请帮忙解释一下吧，谢谢~~~

boozy

题干：只有分裂活跃的细胞才制造出T酶。成年人的身体组织里一般没有这种酶。但是骨髓是个例外，因为成年人的骨髓细胞也在持续分裂以制造新的血细胞。癌细胞是另外的例外，它们快速分裂。

题目：上面信息支持哪个选项：

A不对，充分条件还是必要条件弄反了。癌细胞有没有除了T以外自己特有的酶，同时不在分裂不活跃的细胞中，文中没说；
B不对，毛病同上。T酶只在活跃分裂的细胞里产生，不等于分裂活跃的细胞一定有它。
C对，
D不对，文中没把不同癌细胞的发展速度进行对比。
E不对，骨髓细胞里T酶的水平可能比癌组织的高呢。

Kb24

楼上的说的太对啦。