题目内容
（请给出正确答案）
A、enthusiasm
B、pity
C、understanding
D、lack of interest
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更多“Determined to shock her students out of their apathy, the history teacher showed up for class one da…”相关的问题
Scientists and engineers studied the shock waves of the San Francisco earthquake. The city was rebuilt and new features were【C12】 ______ to strengthen buildings and【C13】______ a constant water supply【C14】______ the event of another earthquake. Large underground tanks were constructed to supply water if【C15】______ supplies could not be tapped. Special measures were【C16】______ to prevent fires, which often do more damage than earth quakes themselves. The San Francisco earthquake【C17】______ scientists with valuable information. Since the effects of the break were【C18】______ at the surface, scientists could【C19】______ what actually happened, and reports of the incident were an important【C20】______ to the world's store of knowledge a bout earthquakes.
【C1】
A．provided
B．supplied
C．supplemented
D．supported
Earth's Inner Core
Scientists have long struggled to understand what lies at the planet's center. Direct observation of its center is impossible, so researchers must(51) to other evidence.
In 1889, a German scientist detected a severe earthquake in Japan. Geophysicists concluded that shock waves(52) jolts (晃动)from one side of Earth through the center to the other side. Then in 1936, Danish geophysicist lnge Lehmann studied the waves'(53) to determine that within Earth's core of molten (熔化了的)iron lies a solid inner core - but(54) that core was made of eluded (难倒)her. Other geophysicists quickly determined that Lehmann's inner core was composed mostly(55) iron. Since then, Lehmann's discovery has(56) conventional Earth science.
But now scientists are challenging traditional theory with new and radical(57) . For example, Earth's center could actually contain an "inner core within the inner core," claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave(58) , they maintain that the inner core has at its heart a tiny, even more solid sphere (球体). This sphere "may be the oldest fossil(59) from the formation of Earth," says Dziewonski.
Dziewonski and Ishii speculate that shortly(60) Earth formed around 4.8 billion years ago, a giant asteroid (小行星)smashed into the young planet and nearly melted it. But Earth's center didn't quite melt; it(61) mass as the planet cooled. The core within a core may be the kernel (核心)that endured. "its presence could change our basic ideas about the(62) of the planet," Dziewonski says.
Dziewonski's idea is tame (温和的)compared to the(63) theories of independent geophysicist J. Marvin Herndon. Earth's inner core is made not of iron, he claims, but a(64) of nickel and silicon. Herndon has a truly revolutionary notion: Within the nickel silicide (硅化物)inner core is also an "inner" inner core - an 8 km-wide ball of the element uranium. Uranium is radioactive. Herndon thinks the uranium releases heat energy as its atoms(65) fission-split and crash into one another in a chain reaction. In other words, we may live on top of a gigantic, "natural" nuclear power plant.
A．try
B．leave
C．turn
D．point
A、Culture Shock
B、Culture Shock Part 2
C、Culture Shock Returns
D、Reverse Culture Shock
The main idea of this passage is that______.
A．culture shock is an occupational disease
B．culture shock is caused by the anxiety of living in a strange culture
C．culture shock has peculiar symptoms
D．it is very hard to cope with life in a new setting
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