受到留党察看处分，其党内职务（）。A、自然撤销 B、可以保留 C、根据情况待定

最近三年来，捷达牌计算机的销量有了飞速的增长。而同一时期，该品牌用于电视广告的费用也明显增长了。因而有人认为，捷达牌计算机销量的增长，得益于其电视广告的促销作用。

以下哪项为真，最能削弱上述结论

A．捷达牌计算机的购买者中，很少有人注意到该品牌的电视广告
B．宏远牌计算机是捷达的主要竞争对手，它的电视广告投入更多
C．注意到捷达牌计算机电视广告的人中，很少有人购买该产品
D．最近三年来，人们对计算机的需求总量有明显增长

人们习惯称文学研究会的创作为“（）”或“为人生”的文学。

成釉细胞瘤为"临界瘤"的主要原因是（）

A.来源于牙源性上皮

B.长得特别大

C.瘤体内牙根吸收

D.有局限性浸润生长

E.压迫三叉神经引起相应部位麻木

强力刨削一般用于刨削（）

A、簿板

B、大面积

C、成型面

D、簿壁箱体

Since the 1930s, the idea that creatures might advertise their " fitness " as mates through symmetry has been around. It rests on the notion that factors ranging from bad genes to coming off worse in too many fights will lead to asymmetries others can see. And over the past few years, experiments with animals and humans seemed to support the idea that symmetry in features such as plumage and facial characteristics influences mate selection.

But no one had actually checked that the animals in these experiments can actually see the subtle differences in symmetry, typically of between 1 and 2 percent. Now the first such experiment has been carried out. The results are worrying for advocates of symmetry detection as a powerful factor in mate selection.

John Swaddle, an ethnologist at the University of Bristol, performed the experiment using wild starlings, which have excellent eyesight. He trained them to hit keys marked with bar patterns with varying levels of asymmetry in order to receive food rewards. This showed the starlings could easily detect asymmetries of between 5 and 10 percent. But at between 1 and 2 percent, their performance plummeted to no better than random guessing.

" This suggests that the levels of asymmetry that birds encounter in nature will often be just too small to be detected, " says Swaddle. He says experiments that linked small asymmetries to fitness may have produced misleading correlations, and says the only direct evidence that birds use asymmetry as a cue to mate fitness involves levels of asymmetry of at least 10 percent. " I think signaling by asymmetry will probably only occur when species show such very large asymmetries—and this doesn’t occur that often. "

This raises questions about research suggesting that humans are influenced by visual asymmetry in their choice of partner. Michael Butt of the Perception Laboratory at the University of St. Andrews, who has carried out such experiments, concedes that no one has ever checked if humans have a threshold to asymmetry detection. He thinks a conclusive test of this would probably involve manipulating complex three-dimensional images: " It would be a very difficult experiment to do "

Burt adds that the abilities of animals to detect asymmetry in bar patterns may not reflect their talent for spotting asymmetries in body shape. " The visibility of an asymmetry may well depend on its type, " he says. Swaddle agrees, and is planning further experiments. " But I suspect that asymmetry is used as a visual cue less often than most people appear to presume, " he warns.

According to the passage, which of the following is TRUE（）

A. Swaddle thinks asymmetry and fitness are associated

B. Asymmetry is generally visible

C. Species use asymmetry as a cue to mate fitness

D. Nobody has checked human’s dependence on asymmetry