从一个正方形木板锯下宽为12米的一个木条以后，剩下的面积是6518平方米，问锯下

不符合硬化性肾小球肾炎的描述是（）

A.可引起贫血

B.可引起高血压

C.可引起严重的蛋白尿

D.可引起水电解质紊乱

E.可引起氮质血症

油发适用于含胶质丰富、______多的干料。

A．含纤维素

B．含脂肪酸

C．结缔组织

D．肌肉组织

MIDI文件记录的不是可供直接播放的波形信息，因此在播放MIDI音乐时必须通过合成器将它转换成波形信号。根据乐音生成的原理，PC机声卡使用的MIDI合成器分为两类：一类是数字调频(FM)合成器，还有一类是 【19】 合成器。

浸润型肺结核（）

A.大多是局灶型肺结核发展而来

B.属于非活动性肺结核

C.多数可发展为干酪样肺炎

D.多数并发结核性脓气胸

E.多数可发展为慢性纤维空洞型肺结核

The ocean bottom—a region nearly 2.5 times greater than the total land area of the Earth —is a vast frontier that even today is largely unexplored and uncharted. Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3,600 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth’s surface, the deep-ocean bottom is a hostile environment to humans, in some ways as forbidding and remote as the void of outer space.
Although researchers have taken samples of deep-ocean rocks and sediments for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation’s Deep Sea Drilling Project (DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP’s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill in very deep waters, extracting samples of sediments and rock from the ocean floor.
The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger’s core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to calculate what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger’s voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth.
The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understanding the world’s past climates. Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change—information that may be used to predict future climates.

Deep-ocean sediments provide better information about the world’s past climate because they______.

A. are well protected

B. have land-based evidence
C. are in isolation


D. have a longer history