问题 填空题

某研究小组的同学利用样方法研究野生山坡上A、B、C三个不同地点的植物群落,他们也测量了各种土壤特征和环境因素,结果见下表。根据所得数据回答问题:

(1)根据调查结果判断,物种丰富度最大的地点是          

(2)如果遭遇山火,山坡的植被彻底烧光,原地点将发生的群落演替属于        

(3)参考表中非生物因素,松树在地点C不能生长的原因是                  (说出两个原因)。

答案

(1)A

(2)次生演替

(3)土壤深浅度,不足以支持高大树木的生长;土壤湿度小,水分不足以支持树木的生长(土壤氨的含量低,缺少养分供树木生长)

单项选择题
单项选择题

People from East Asia tend to have more difficulties than those from Europe in distinguishing facial expressions - and a new report published online in Current Biology explains why.

Rachael Jack, University of Glasgow researcher, said that rather than scanning evenly (均匀 的) across a face as Westerners do, Easterners fix their attention on the eyes.

"We show that Easterners and Westerners look at different face features to read facial expressions," Jack said. "Westerners look at the eyes and the mouth in equal measure, whereas Easterners favor the eyes and neglect (忽略) the mouth. "

According to Jack and her colleagues, the discovery shows that human communication of emotion is more complex than previously believed. As a result, facial expressions that had been considered universally recognizable cannot be used to reliably convey emotion in cross cultural situations.

The researchers studied cultural differences in the recognition of facial expressions by recording the eye movements of 13 Western Caucasian and 13 East Asian people while they observed pictures of expressive faces and put them into categories : happy, sad, surprised, fearful, disgusted, angry,

or neutral. They compared how accurately participants read those facial expressions using their particular eye movement strategies.

It turned out that Easterners focused much greater attention on the eyes and made significantly more errors than did Westerners. "The cultural difference in eye movements that they show is probably a reflection of cultural difference in facial expressions," Jack said. " Our data suggest that whereas Westerners use the whole face to convey emotion, Easterners use the eyes more and mouth less. "

In short, the data show that facial expressions are not universal signals of human emotion. From here on, examining how cultural factors have diversified these basic social skills will help our under- standing of human emotion. Otherwise, when it comes to communicating emotions across cultures, Easterners and Westerners will find themselves lost in translation.

What does the underlined word "they" in Paragraph 6 refer to().

A. The participants in the study.

B. The researchers in the study.

C. The errors made during the study.

D. The data collected from the study.