1 |
8 |
A.1 | B.2 | C.3 | D.4 |
10 |
80 |
1 |
8 |
90×40+80×50 |
40+50 |
7600 |
90 |
4 |
9 |
A.①②③ | B.①②④ | C.①③④ | D.①②③④ |
x2 |
a2 |
y2 |
b2 |
1 |
x2 |
1 |
y2 |
1 |
a |
1 |
b |
a2 |
x2 |
b2 |
y2 |
xx′ |
a2 |
yy′ |
b2 |
A.1个 | B.2个 | C.3个 | D.4个 |
2 |
sin2x |
A.3 | B.2 | C.1 | D.0 |
A.若sinA=
| ||
B.若cosA=
| ||
C.a=80,b=100,A=45°的三角形有一解 | ||
D.a=18,b=20,A=150°的三角形一定存在 |
A.a>b⇒ac2>bc2 | B.a>b⇒a2>b2 |
C.a>b⇒a3>b3 | D.a2>b2⇒a>b |
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