搜题请搜索小程序“爱下问搜题”
问题 单项选择题

红细胞大小不一最常见于

A．缺铁性贫血
B．溶血性贫血
C．再生障碍性贫血
D．失血性贫血
E．巨幼细胞性贫血

答案

参考答案：E

解析：巨幼细胞性贫血常见红细胞大小不一，以大细胞为主，两者相差可达数倍以上。

单项选择题

Research on animal intelligence always makes me wonder just how smart humans are. (91) the fruitfly experiments described in Carl Zimmer’s piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly (92) to live shorter lives. This suggests that (93) bulbs burn longer, that there is an (94) in not being too terrifically bright.
Intelligence, it (95) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (96) the starting line because it depends on learning—a gradual (97) —instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to (98) .
Is there an adaptive value to (99) intelligence That’s the question behind this new research. I like it. Instead of casting a wistful glance (100) at all the species we’ve left in the dust I.Q. wise, it implicitly asks what the real (101) of our own intelligence might be. This is (102) the mind of every animal I’ve ever met.
Research on animal intelligence also makes me wonder what experiments animals would (103) on humans if they had the chance. Every cat with an owner, (104) , is running a small-scale study in operant conditioning, we believe that (105) animals ran the labs, they would test us to (106) the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really (107) , not merely how much of it there is. (108) , they would hope to study a (109) question. Are humans actually aware of the world they live in (110) the results are inconclusive.

A．at

B．for

C．after

D．with
查看答案
单项选择题

关于企业形象，正确的说法是（）。

A．文明礼貌是企业形象的核心与关键

B．企业形象的本质是企业的环境卫生和企业员工的服饰状况

C．企业形象是社会公众和企业员工对企业的整体印象和评价

D．通过持久、大规模的媒体宣传，就能树立起企业形象
查看答案