3 |
2 |
π |
3 |
2x |
5 |
2x |
3 |
7π |
2 |
π |
4 |
π |
4 |
2 |
π |
4 |
2 |
3 |
2 |
π |
3 |
2x |
5 |
2π | ||
|
2x |
3 |
7π |
2 |
2x |
3 |
π |
4 |
π |
4 |
π |
2 |
θ |
2 |
θ |
2 |
θ |
2 |
θ |
2 |
AB |
3 |
AC |
AD |
AB |
AC |
A.0 | B.1 | C.2 | D.3 |
A.一条直线与一个平面内的无数条直线垂直,则此直线与平面垂直 |
B.两条异面线不能同时垂直于同一个平面 |
C.直线倾斜角α的取值范围是0°<α≤180° |
D.二条异面直线所成的角的取值范围是0°<α<90° |
x1+x2 |
2 |
f(x1)+f(x2) |
2 |
f(x1)-f(x2) |
x1-x2 |
A.①②③④ | B.①②③ | C.②③ | D.③ |
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