[研究生入学考试题库]考研英语(二)模拟题74.docx

[研究生入学考试题库]考研英语(二)模拟题74 Section Ⅰ Use of EnglishDirections: Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on the ANSWER SHEET.  On the surface, Mars is the picture of desolation. A barren land remains 1 for hundreds of millions of years, motionless 2 the scattering of powdery dust by a faint breeze. But perhaps just 3 the Martian soil, the picture is very different.  New evidence suggests the presence of a lake one mile beneath the ice-coated surface of Mars's south 4 , according to new research published Wednesday in Science. Scientists say the lake 5 20 kilometers across, and is one meter in 6 The findings, if 7 , would mark the detection of the largest body of 8 water on Mars today.  The data comes from Mars Express, a European spacecraft that 9 Mars for 15 years. 10 a high-resolution camera snapped stunning images of the surface, a radar instrument probed what was 11 underground.  The instrument—the Mars Advanced Radar for Subsurface and Ionosphere Sounding, or MARSIS 12 --emits radio waves toward the planet. The waves penetrate the Martian surface and bounce off 13 material they come in contact with, then reflect back to the spacecraft. MARSIS 14 the echoes of the radio waves, which scientists can then 15 to decipher the composition of the subsurface.  Starting in May 2012, MARSIS 16 more than three years pinging a region at Mars with radio waves. 17 helps to look at the data yourself. In addition to an illustration that shows how Mars Express 18 Mars, the image 19 what's called a radargram, a picture of different materials, molded out of radio waves. The thick, gray line at the top is the planet's surface. The squiggles below that are a 20 of ice and dust. 1.A.variableB.unchangedC.vigorousD.universal答案:B[考点] 词义辨析题。[解析] 根据上下文可知，本