单选题. Now listen to the following recording and answer questions 23 to 25.8.

单选题[此试题无题干]

单选题33. Millions of people around the world have some type of physical, mental, or emotional ______ that severely limits their abilities to manage their daily activities.

单选题. The human criterion for perfect vision is 20/20 for reading the standard lines on a Snellen eye chart without a hitch. The score is determined by how well you read lines of letters of different sizes from 20 feet away. But being able to read the bottom line on the eye chart does not approximate perfection as far as other species are concerned. Most birds would consider us very visually handicapped. The hawk, for instance, has such sharp eyes that it can spot a clime on the sidewalk while perched on top of the Empire State Building. It can make fine visual distinctions because it is blessed with one million cones per square millimeter in its retina (视网膜). And in water, humans are farsighted, while the kingfisher, swooping down to spear fish, can see well in both the air and water because it is endowed with two foveae (凹窝)areas of the eye, consisting mostly of cones, that provide visual distinctions. One fovea permits the bird, while in the air, to scan the water below with one eye at a time. This is called monocular vision. Once it hits the water, the other fovea joins in, allowing the kingfisher to focus both eyes, like binoculars, on its prey at the same time. A frog's vision is distinguished by its ability to perceive things as a constant motion picture. Known as "bug detectors", a highly developed set of cells in a frog's eyes responds mainly to moving objects. So, it is said that a frog sitting in a field of dead bugs wouldn't see them as food and would starve. The bee has a "compound" eye, which is used for navigation. It has 15,000 facets that divide what it sees into a pattern of dots, or mosaic. With this kind of vision, the bee sees the sun only as a single dot, a constant point of reference. Thus, the eye is a superb navigational instrument that constantly measures the angle of its line of flight in relation to the sun. A bee's eye also gauges flight speed. And if that is not enough to leave our 20/20 "perfect vision" paling into insignificance, the bee is capable of seeing something we can't—ultraviolet light. Thus, what humans consider to be "perfect vision" is in fact rather limited when we look at other species. However, there is still much to be said for the human eye. Of all the mammals, only humans and some primates can enjoy the pleasures of color vision.1. The Snellen eye chart measures one's eyesight by ______.

单选题. Questions 16 to 19 are based on the recording you have just heard.1.

单选题37. There are not many teachers who are strong ______ of traditional methods in English teaching.

单选题. Now listen to the following recording and answer questions 19 to 21.4.

单选题. Questions 5 to 8 are based on the conversation you have just heard.5.

单选题15. High grades are supposed to ______ academic ability, but John's actual performance did not confirm this.

单选题Questions 1 to 10 are based on the following passage.Is your promotion really necessary? Many workers focus their hopes on climbing the hierarchy of their____1____.The prospect of higher pay helps exp

单选题Questions 1 to 10 are based on the following passage.The ocean covers 70.8% of the Earths surface.That share is____1____ up.Averaged across the globe, sea levels are 20cm higher today than they w

单选题. Questions 9 to 11 are based on the passage you have just heard.1.

单选题. Questions 5 to 8 are based on the conversation you have just heard.5.

单选题. Questions 1 to 4 are based on the conversation you have just heard.1.

单选题Growing Price Tag for College ShutdownsAA string ofrecent for-profit college closures has led to tens ofmillions of dollars in student loan cancellation, creating new costs for the federal govemment o

单选题. Questions 12 to 15 are based on the passage you have just heard.4.

单选题《复合题被拆开情况》 The U.S. and China don’t agree on much these days. Germany and France share a border and a currency but are frequently at odds. The U.K. and India like to march to their own drum. But there