4.在中,,则是 ( C )
A.正三角形 B.锐角三角形 C.直角三角形 D.钝角三角形
3.在等差数列中,若,则的值为( C )
A.14 B.15 C.16 D.17
2.已知a是非0实数,则“a>1”是“”的 ( A )
A.充分不必要条件 B.必要不充分条件 C.充要条件 D.既不充分也不必要条件
1.不等式的解集是 ( D )
A.(-1,3) B.(-3,1)(3,7)
C.(-7,-3) D.(-7,-3)(-1,3)
25.The book didn’t children probably because the author employed too many scientific terms in it.
A.apply to B.appeal to C.intend to D.lead to
答案 C
24.For the moment notice was of nuclear talks between Iran and some western countries.
A.paid B.taken tered D.given
答案 B`
23.Newadays many teenayers want to from their parents and live a life being controued.
A.break away;free from B.break up;free of
C.break off;opposed to D.break down;instead of
答案 A
22. When I was in kindergarten,I was often by my teachers to be polite to the adults.
A.demanded B.reminded C.allowed D.hoped
答案 B
21.The film star is content with herself,and she always likes to her nice figure by wearing
tight dresses in public.
A.get off B.show off C.put off D.turn off
20.They are still the missing child,who disappeared last Sunday after attending her friend’s birthday party.
A.asking for B.calling for C.hunting for D.sending for