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Sedimentary rock hardens within the earth’s crust as layers of matter accumulate and the pressure of the layers above converts the layers below into rock. One particular layer of sedimentary rock that contains an unusual amount of the element iridium has been presented as support for a theory that a meteorite collided with the earth some sixty million years ago. Meteorites are rich in iridium compared to the earth’s crust, and geologists theorize that a meteorite’s collision with the earth raised a huge cloud of iridium-laden dust. The dust, they say, eventually settled to earth where it combined with other matter, and as new layers accumulated above it, it formed a layer of iridium-rich rock.
Which one of the following, if true, would counter the claim that the iridium-rich layer described in the passage is evidence for the meteorite collision theory（）

A. The huge dust cloud described in the passage would have blocked the transmission of sunlight and lowered the earth’s temperature
B. A layer of sedimentary rock takes millions of years to harden
C. Layers of sedimentary rock are used to determine the dates of prehistoric events whether or not they contain iridium
D. Sixty million years ago there was a surge in volcanic activity in which the matter spewed from the volcanoes formed huge iridium-rich dust clouds
E. The iridium deposit occurred at about the same time that many animal species became extinct and some scientists have theorized that mass dinosaur extinctions were caused by a meteorite collision

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Working Successfully within Cultural Boundaries

Soon after starting our job in China, we realized that the greatest challenge we faced would not be our day-to-day responsibilities but a completely foreign work environment and culture.
We were used to the very direct, sometimes confrontational, but more equal style of management in the United States. Here, we were faced with the never-direct, never-confrontational style of management common in Asia.
We often hear similar stories. One woman shared her experience of returning to China after more than 15 years in the US. Although she spent most of her childhood in China, she felt that her colleagues’ thinking processes were completely foreign to her. She needed to adapt herself to the culture of her company only then would she be successful at her job. In the end, she wasn’t able to successfully re-adapt herself to the culture. What she didn’t realize was that, rather than disagreei
A. In the USA, it is indirect style of management. In China, it is direct.
B. In the USA, it is direct style of management. In China, it is never-direct.
C. In the USA, it is always confrontational. In China, it is sometimes confrontational.
D. In the USA, it is equal. In China it is unequal.

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[简答题]

The energy contained in rock within the earth’s crust represents a nearly unlimited energy source, but until recently commercial retrieval has been limited to underground hot water and/or steam recovery systems. These systems have been developed in areas of recent volcanic activity, where high rates of heat flow cause visible eruption of water in the form of geysers and hot springs. In other areas, however, hot rock also exists near the surface but there is insufficient water present to produce eruptive phenomena. Thus a potential hot dry rock (HDR) reservoir exists whenever the amount of spontaneously produced geothermal fluid has been judged inadequate for existing commercial systems.
As a result of the recent energy crisis, new concepts for creating HDE recovery systems—which involve drilling holes and connecting them to artificial reservoirs placed deep within the crust—are being developed. (46) In all attempts to retrieve energy from HED’s

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