e first maser built?
(A) 1917
(B) 1951
(C) 1953
(D) 1957
8. The word "emerged" in line 20 is closest in meaning to
(A) increased
(B) concluded
(C) succeeded
(D) appeared
9. The word "outlining" in line 21 is closest in meaning to
(A) assigning
(B) studying
(C) checking
(D) summarizing
10. Why do people still argue about who deserves the credit for the concept of the laser?
(A) The researchers’ notebooks were lost.
(B) Several people were developing the idea at the same time.
(C) No one claimed credit for the development until recently.
(D) The work is still incomplete.
Question 11——21
Panel painting, common in thirteenth -and fourteenth -century Europe , involved a
painstaking , laborious process. Wooden planks were joined, covered with gesso to
prepare the surface for painting , and then polished smooth with special tools. On this
perfect surface, the artist would sketch a composition with chalk, refine it with inks,
and then begin the deliberate process of applying thin layers of egg tempera paint (egg
yolk in which pigments are suspended) with small brushes. The successive layering of
these meticulously applied paints produced the final, translucent colors.
Backgrounds of gold were made by carefully applying sheets of gold leaf, and then
embellishing of decorating the gold leaf by punching
it with a metal rod on which a
pattern had been embossed. Every step in the process was slow and deliberate . The
quick-drying tempera demanded that the artist know exactly where each stroke be
placed before the brush met the panel, and it required the use of fine brushes. It was,
therefore , an ideal technique for emphasizing&n
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