Unit 6: AN EXCURSION

Câu hỏi trắc nghiệm

 Read the paragraphs below carefully, and then put them in the correct order to make a meaningful passage:

MOON ROCKS HOLD HIGH PRIORITY

1/ Shortly after stepping onto the surface, Armstrong took a “grab sample,” or contingency sample, scooping it up into a Teflon bag on the end of a light collapsible ro The pole he discarded, but the bag of soil he rolled up and—with some difficulty—tucked into a pocket above his left knee.

2/ With a specially made aluminum scoop on an extension handle, and with a pair of long aluminum tongs, Armstrong later gathered a larger quantity of the dark lunar soil and representative samples of the lunar rocks. These he put into two boxes, each formed from a single piece of aluminum. A ring of soft metal, indium, lined the lip of each box; when the box was closed and the straps drawn tight around it, a knifelike strip around the edge of the lid bit deeply into the indium, thus helping to seal the samples in a vacuum and to protect them against contamination.

3/ It had been decided in advance that the most important single thing the astronauts could do—scientifically speaking—would be to bring back samples of the moon.

4/ All told, the astronauts brought back about 48 pounds of lunar material. In addition, they undertook to gather a bit of the sun. To be sure, it was a very small sample, less than a billionth of an ounce at best, but presumably it was enough to tell a great deal about the solar furnace. The sample was gathered by trapping particles of the solar win

5/ In every direction, the lunar surface was pocked with thousands of little craters and many larger ones, five to fifty feet across and littered with angular blocks.

6/ As Astronaut-scientist Don Lind commented in Houston during the flight, “He is certainly going to get back in the spacecraft with his pants on, so we will have this sample for sure.”

  1. 5-3-1-6-2-4
  2. 3-5-6-2-4-1
  3. 1-2-3-6-5-4
  4. 4-3-4-6-1-5