求教：GWD24-31 望大家帮忙~~

zlin0222

?Telomerase is an enzyme that is produced only in cells that are actively dividing.For this reason it is generally absent from body tissues in adults.Bone 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 other kind of adult tissue.
?E,The level of telomerase production is always higher in cancerous tissue than in noncancerous tissue.

答案：C  想明白了 可是还是没明白W为什么不对呢？？

chelseeea

w?

zlin0222

w?

-- by 会员 chelseeea (2011/5/19 10:55:09)

哈哈哈哈我错了。。是E为什么不对呢

chelseeea

快分裂的CELL里有T，成人身体TISSUE里一般没T。成人BM和CANCER是例外，分裂的快。

E可以有2个错
1。如果T在BONE MARROW（NON CANCEROUS CELL）里的LEVEL大于CANCER CELL里的呢？
2。 而且E没有限定是成人，如果小孩CELL比CANCER快呢？

E完全不一定

zlin0222

快分裂的CELL里有T，成人身体TISSUE里一般没T。成人BM和CANCER是例外，分裂的快。

E可以有2个错
1。如果T在BONE MARROW（NON CANCEROUS CELL）里的LEVEL大于CANCER CELL里的呢？
2。 而且E没有限定是成人，如果小孩CELL比CANCER快呢？

E完全不一定

-- by 会员 chelseeea (2011/5/19 11:09:14)

哦哦对了。。没有想到。。谢谢啦！！都是你帮我解答的呢 嘿嘿

chelseeea

你不是要考了么，我也是，同可怜，互相帮助了

zlin0222

你不是要考了么，我也是，同可怜，互相帮助了

-- by 会员 chelseeea (2011/5/19 11:26:10)

嗯嗯23号北京 你呢？诶心里没底啊 祝咱们都能拿高分哈！

chelseeea

哈哈，对，我们都要加油！！我下月21号，你要也下月可以一起复习，我现在每天跟国图泡着

zlin0222

哈哈，对，我们都要加油！！我下月21号，你要也下月可以一起复习，我现在每天跟国图泡着

-- by 会员 chelseeea (2011/5/19 11:37:48)

我这月啊。。所以没几天了啊。。。

chelseeea

啊...加油加油！！！