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A．pH=1.03 B．pH=4.12
C．pH=4.75 D．pH=2.06
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A、Porque los chinos suelen pedir ayuda a sus familiares cuando se encuentran en una situación difícil.
B、Porque la familia es uno de los factores más importantes para lograr la felicidad.
C、Porque los chinos creen que los familiares son los más honrados.
D、
Every geologist is familiar with the erosion cycle. No sooner has an area of land been raised alive sea-level than it becomes subject to the erosive forces of nature. The rain beats down on the ground and washed【51】the finer particles, sweeping them into rivulets and then into rivers and out to sea. The frost freezes the rain water in cracks of the rocks and breaks【52】even the hardest of the constituents of the earth's crust. Blocks of rock dislodged at high levels are brought down by the force of gravity. Alternate heating and【53】of bare rock surfaces causes their disintegration. In the dry regions of the world the wind is a powerful force in removing material from one area to another. All this is natural. But nature has also provided certain defensive forces. Bare rock surfaces are in【54】course protected by soil itself dependent initially on the weathering of the rocks. Slowly【55】surely, different types of soil with differing "profiles" evolve the main types depending primarily on the climate. The protective soil covering, once it is formed, is held together by the growth of vegetation. Grass and herbaceous plants,【56】long, branching tenuous roots, hold firmly together the surface particles. The【57】is true with the forest cover. The heaviest tropical down- pours beating on the leave of the giant trees reach the ground only【58】spray, gently watering the surface layers and penetrating along the long passages provided by the roots to the lower levels of the soil. The soil, thus protected by grass, herb, or trees, furnishes a quiet habitat for a myriad varied organisms-earth-worms that importantly modify the soil, bacteria, active in their work of converting【59】leaves and decaying vegetation into humus and food for the growing plants. Chemical action is constantly taking【60】. Soil acids attack mineral particles and salts in solution move from one layer in the soil to another.
(51)
37_____________ It is 241 feet long, 20 feet wide, and 66 feet high. The eyes on the face are 6 feet tall, the ears over three feet tall, and the nose would have been nearly 5 feet long before it was knocked off.
Over the past 4,500 years weather and erosion(侵蚀) have damaged the Great Sphinx. It is really amazing that so much of it is left for us to see. 38_____________ It had a long beard and a nose. It also was painted in bright colors. Archeologists think that the face and body were painted red, and the beard was blue.
39_____________ No one is entirely sure exactly how the nose got knocked off. There are stories that Napoleon’s men accidentally knocked off the nose while other stories have the nose getting shot off in target practice by Turkish soldiers.
After the Sphinx was built, over the course of the next 1,000 years it fell into disrepair. 40 _____________ Legend has it that a young prince named Thutmose fell asleep near the head of the Sphinx. He had a dream where he was told that if he restored the Sphinx he would become Pharaoh(法老) of Egypt. Thutmose restored the Sphinx and later became Pharaoh of Egypt.
A. The Great Sphinx is huge!
B. What happened to its nose？
C. The original Sphinx would have looked a lot different
D. It is widely believed that it was carved around 2,500 BC.
E. The Great Sphinx is believed by some scholars to have a beard.
F. The entire body was covered in sand and only the head could be seen
G. Efforts are being made to preserve the Sphinx, but it continues to erode.
36___________
37
38
39
40
A、link
B、bridge
C、middle
D、transport
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