问题 选择题

图为“四地山地植被垂直分布示意图”,甲地位于南半球,其余均位于我国。读图回答题。

小题1:当甲地西坡山麓植被凋零时,四地昼长由长到短的排序是    (   )

A.甲,丁,丙,乙

B.丁,甲,丙,乙

C.乙,丁,甲,丙

D.丁,乙,丙,甲小题2:丙地可能是            (   )

A.天山

B.秦岭

C.大兴安岭

D.阴山

答案

小题1:D

小题2:B

题目分析:

小题1:根据四地的山麓基带的自然带可判断,甲位于赤道附近;乙位于我国西北温带地区;丙位于亚热带地区;丁位于我国东北地区,甲地位于南半球,则热带草原草木凋零为当地的冬季,北半球的夏季,故越往北昼越长,则D项正确。

小题2:图示丙山脉的山麓植被,南侧为亚热带常绿阔叶林,北侧为温带落叶阔叶林,故判断丙地为我国温带气候和亚热带气候的分界线,即秦岭。

点评:本题难度一般,学生只要能抓住山麓的植被类型进而判断山地的纬度位置,并能结合不同季节的太阳直射点位置,进而判断全球的昼夜长短分布规律。

判断题
单项选择题

Young girls at high risk for depression appear to have a malfunctioning reward system in their brains, a new study suggests. The finding comes from research that (1) a high-risk group of 13 girls, aged 10 to 14, who were not depressed but had mothers who (2) recurrent depression and a low-risk group of 13 girls with no (3) or family history of depression. Both groups were given MRI brain (4) while completing a task that could (5) either reward or punishment.

(6) with girls in the low-risk group, those in the high-risk group had (7) neural responses during both anticipation and receipt of the reward. (8) , the high-risk girls showed no (9) in an area of the brain called the dorsal anterior cingulated cortex (背侧前扣带皮质), believed to play a role in (10) past experiences to assist learning.

The high-risk girls did have greater activation of this brain area (11) receiving punishment, compared with the other girls. The researchers said that this suggests that high-risk girls have easier time (12) information about loss and punishment than information about reward and pleasure.

"Considered together with reduced activation in the striatal (纹状体的) areas commonly observed (13) reward, it seems that the reward-processing system is critically (14) in daughters who are at elevated risk for depression, (15) they have not yet experienced a depressive (16) ," wrote Ian H. Gotlib, of Stanford University, and his colleagues. " (17) , longitudinal studies are needed to determine whether the anomalous activations (18) in this study during the processing of (19) and losses are associated with the (20) onset of depression," they concluded. The study was published in the April of the Archives of General Psychiatry.

12()

A.processing

B.counting

C.employing

D.implying