[計量] PP2-DS-20.21.168.214
20.If -2x > 3y, is x negative?
(1) y > 0
(2) 2x + 5y - 20 = 0
答案D 比較困惑第二個答案要怎麼推得呢??
21.Is the integer n odd?
(1) n is divisible by 3.
(2) 2n is divisible by twice as many positive integers as n.
答案B (不太懂第二個選項的意思)
168.
In a certain senior class, 72 percent of the male students and 80 percent of
the female students have applied to college. What fraction of the students in
the senior class are male?
(1) There are 840 students in the senior class.
(2) 75 percent of the students in the senior class have applied to college.
答案B 我選C @@~~
214.
Is the measure of one of the interior angles of quadrilateral ABCD equal to
60 degrees?
(1) Two of the interior angles of ABCD are right angles.
(2) The degree measure of angle ABC is twice the degree measure of angle BCD.
答案E
希望有好心的大牛解答喔^^
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