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  3. It has been a hundred years since the last big one in California, the 1906 San Francisco earth quake, which helped give (1)_____

It has been a hundred years since the last big one in California, the 1906 San Francisco earth quake, which helped give (1)_____

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问题     It has been a hundred years since the last big one in California, the 1906 San Francisco earth quake, which helped give (1)_____ to modem earthquake science. A century later, we have a highly successful (2)_____, called plate tectonics, that explains why 1906-type earthquakes happen—along with why continents drift, mountains rise, and volcanoes (3)_____ the Pacific Rim. Plate tectonics may be one of the (4)_____ triumphs of the human mind, geology’s (5)_____ to biology’s theory of evolution. And yet scientists still can’t say when an earthquake will happen. They can’t even come (6)_____.
    What scientists can do right now is make good maps of fault zones and (7)_____ out which ones are probably due (8)_____ a rupture. And they can make forecasts. A forecast might say that, over a certain number of years, there is a certain (9)_____ of a certain magnitude earthquake in a (10)_____ spot. And that you should fix your house to its foundation and glue the water heater to the wall.
    Turning forecasts into predictions—"a magnitude 7 earthquake is (11)_____ here three days from now"—may be impossible, but scientists are doing everything they can to solve the (12)_____ of earth quakes. They break rocks in laboratories, studying how stone (13)_____ under stress. They hike (14)_____ ghost forests where dead trees (15)_____ of long-ago tsunamis. They make maps of unsecured, balanced rocks to see where the ground has (16)_____ in the past and how hard. They dig ditches across faults, searching for the active trace. They have wired up fault zones with so many sensors it is (17)_____ the Earth is a patient (18)_____ intensive care.
    (19)_____, we tell ourselves—trying hard to be persuasive—there must be some way to (20)_____ order and criterion on all that untrustworthy ground.

选项 A、impression
B、conception
C、judgment
D、theory
答案D
解析 语义衔接题。上文提到1906年旧金山地震孕育了现代地震科学的诞生。本句讲"一个世纪之后，地震科学有所突破"，可以推断一个学科取得进展，必然是建立了一些成功的理论，即文中列出的"板块构造理论"，因此选theory"理论，学说"。impression"印象，感想"；conception"观念，概念"；judgment"判断"；这三个词均不合题意。
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