GWD1-27关于 for several weeks是长期还是短期的问题

xiaoda

According to the passage, the periodic behavior displayed by commuter diatoms under constant laboratory conditions is characterized by which of the following?

 

相关的原文是: However, when diatoms are observed under constant conditions in a laboratory, they still display periodic behavior, continuing to burrow on schedule for several weeks.

A.   Greater unpredictability than the corresponding behavior under natural conditions

B.   A consistent periodic schedule in the short term

C.   No difference over the long term from the corresponding behavior under natural conditions

D.   Initial variability caused by the constant conditions of the laboratory

E.   Greater sensitivity to environmental factors than is the case under natural conditions

我觉得B和C的差别就是在对for several weeks 究竟是"short tterm“还是“long term“的判断？

[此贴子已经被作者于2008-6-20 12:29:43编辑过]

xiaoda

有人还在做GWD第一套吗? 感觉这一套真的比后面几套难啊…… 请教NN！

xiaoda

up

masaki006

同样纠结于这个问题，怎么看出来是短还是长啊？求解释