挑战习题
1
/5
单选题
难度：
1.已知a=9
6
，b=3
14
，c=27
5
，则a、b、c的大小关系是（ ）
A
a＞b＞c
B
a＞c＞b
C
c＞b＞a
D
b＞c＞a
提示1：
IOagueaNruW5gueahOS5mOaWueazleWIme+8muW6leaVsOS4jeWPmO+8jOaMh+aVsOebuOS5mC4g77yIYTxzdXA+bTwvc3VwPu+8iTxzdXA+bjwvc3VwPj1hPHN1cD5tbjwvc3VwPu+8iG3vvIxu5piv5q2j5pW05pWw77yJ5YiG5Yir6K6h566X5b6X5Ye65Y2z5Y+vLg==
正确答案：
Qw==
6Kej77ya4oi1YT05PHN1cD42PC9zdXA+Pe+8iDM8c3VwPjI8L3N1cD7vvIk8c3VwPjY8L3N1cD49MzxzdXA+MTI8L3N1cD7vvIxiPTM8c3VwPjE0PC9zdXA+77yMYz0yNzxzdXA+NTwvc3VwPj3vvIgzPHN1cD4zPC9zdXA+77yJPHN1cD41PC9zdXA+PTM8c3VwPjE1PC9zdXA+77yMPGJyPuKItGHvvJxi77ycY++8jDxicj7mlYXpgInvvJpDLiA=
2
/5
单选题
难度：
2.已知a=2
55
，b=3
44
，c=4
33
，则a，b，c的大小关系是（ ）
A
a＞b＞c
B
b＞c＞a
C
a＞c＞b
D
c＞b＞a
提示1：
IOagueaNruW5gui/kOeul+eahOaAp+i0qO+8jOWPiuWug+S7rOeahOaMh+aVsOebuOWQjO+8jOWPqumcgOavlOi+g+Wug+S7rOeahOW6leaVsOeahOWkp+Wwj++8jOW6leaVsOWkp+eahOWwseWkpy4=
正确答案：
Qg==
6Kej77yaYT0yPHN1cD41NTwvc3VwPj3vvIgyPHN1cD41PC9zdXA+77yJPHN1cD4xMTwvc3VwPj0zMjxzdXA+MTE8L3N1cD7vvIw8YnI+Yj0zPHN1cD40NDwvc3VwPj3vvIgzPHN1cD40PC9zdXA+77yJPHN1cD4xMTwvc3VwPj04MTxzdXA+MTE8L3N1cD7vvIw8YnI+Yz00PHN1cD4zMzwvc3VwPj3vvIg0PHN1cD4zPC9zdXA+77yJPHN1cD4xMTwvc3VwPj02NDxzdXA+MTE8L3N1cD7vvIw8YnI+5YiZYu+8nmPvvJ5hLiA=
3
/5
单选题
难度：
3.已知a=81
31
，b=27
41
，c=9
61
，则a，b，c的大小关系是（ ）
A
a＞b＞c
B
b＞c＞a
C
a＞c＞b
D
c＞b＞a
提示1：
IOWFiOaKijgx77yMMjfvvIw56L2s5YyW5Li65bqV5pWw5Li6M+eahOW5gu+8jOWGjeagueaNruW5gueahOS5mOaWue+8jOW6leaVsOS4jeWPmO+8jOaMh+aVsOebuOS5mOWMlueugC4g54S25ZCO5qC55o2u5oyH5pWw55qE5aSn5bCP5Y2z5Y+v5q+U6L6D5aSn5bCPLg==
正确答案：
QQ==
6Kej77ya4oi1YT04MTxzdXA+MzE8L3N1cD4977yIMzxzdXA+NDwvc3VwPu+8iTxzdXA+MzE8L3N1cD49MzxzdXA+MTI0PC9zdXA+PGJyPmI9Mjc8c3VwPjQxPC9zdXA+Pe+8iDM8c3VwPjM8L3N1cD7vvIk8c3VwPjQxPC9zdXA+PTM8c3VwPjEyMzwvc3VwPu+8mzxicj5jPTk8c3VwPjYxPC9zdXA+Pe+8iDM8c3VwPjI8L3N1cD7vvIk8c3VwPjYxPC9zdXA+PTM8c3VwPjEyMjwvc3VwPi4gPGJyPuWImWHvvJ5i77yeYy4gPGJyPuaVhemAiUEuIA==
4
/5
单选题
难度：
4.3
5
0
，4
40
，5
30
的大小关系为（ ）
A
3
50
＜4
40
＜5
30
B
5
30
＜3
50
＜4
40
C
5
30
＜4
40
＜3
50
D
4
40
＜5
30
＜3
50
提示1：
IOagueaNruW5gueahOS5mOaWueazleWIme+8jOWwhuavj+S4gOS4quaVsOWMluS4uuaMh+aVsOebuOWQjOeahOaVsO+8jOWGjeavlOi+g+W6leaVsC4=
正确答案：
Qg==
6Kej77ya4oi1MzxzdXA+NTA8L3N1cD4977yIMzxzdXA+NTwvc3VwPu+8iTxzdXA+MTA8L3N1cD49MjQzPHN1cD4xMDwvc3VwPu+8jDxicj40PHN1cD40MDwvc3VwPj3vvIg0PHN1cD40PC9zdXA+77yJPHN1cD4xMDwvc3VwPj0yNTY8c3VwPjEwPC9zdXA+77yMPGJyPjU8c3VwPjMwPC9zdXA+Pe+8iDU8c3VwPjM8L3N1cD7vvIk8c3VwPjEwPC9zdXA+PTEyNTxzdXA+MTA8L3N1cD7vvIw8YnI+4oi0NTxzdXA+MzA8L3N1cD7vvJwzPHN1cD41MDwvc3VwPu+8nDQ8c3VwPjQwPC9zdXA+77yMPGJyPuaVhemAiUIuIA==
5
/5
单选题
难度：
5.已知M=6
2007
+7
2009
，N=6
2009
+7
2007
，那么M，N的大小关系是（ ）
A
M＞N
B
M=N
C
M＜N
D
无法确定
提示1：
IOWFiOeUqOS9nOW3ruazle+8jOWGjeagueaNruWQjOW6leaVsOeahOW5guWIhuWIq+aPkOWPluWFrOWboOW8j++8jOaVtOeQhuiuoeeul+WQjuWIpOaWreWHuuato+i0n+aDheWGteWNs+WPr+W+l+WIsE3jgIFO55qE5aSn5bCP5YWz57O7Lg==
正确答案：
QQ==
6Kej77ya4oi1TS1OPTY8c3VwPjIwMDc8L3N1cD4rNzxzdXA+MjAwOTwvc3VwPi02PHN1cD4yMDA5PC9zdXA+LTc8c3VwPjIwMDc8L3N1cD7vvIw8YnI+PTY8c3VwPjIwMDc8L3N1cD7vvIgxLTY8c3VwPjI8L3N1cD7vvIkrNzxzdXA+MjAwNzwvc3VwPu+8iDc8c3VwPjI8L3N1cD4tMe+8ie+8jDxicj49NDjDlzc8c3VwPjIwMDc8L3N1cD4tMzXDlzY8c3VwPjIwMDc8L3N1cD7vvJ4w77yMPGJyPuKItE3vvJ5O77yMPGJyPuaVhemAiUEuIA==