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 |
x2 |
a2 |
y2 |
b2 |
x2 |
a2 |
y2 |
b2 |
x2 |
a2 |
y2 |
b2 |
1 |
x2 |
1 |
y2 |
x2 |
a2 |
y2 |
b2 |
1 |
a |
1 |
b |
a2 |
x2 |
b2 |
y2 |
1 |
sin2x |
1 |
cos2x |
1 |
sin2x?cos2x |
4 |
sin22x |
x2 |
a2 |
y2 |
b2 |
xx′ |
a2 |
yy′ |
b2 |
a |
a |
a |
a |
b |
a |
b |
A.原命题真 | B.逆命题真 | C.两命题都真 | D.两命题都假 |
A.真命题的个数一定是奇数 |
B.真命题的个数一定是偶数 |
C.真命题的个数可以是奇数也可以是偶数 |
D.真假命题的个数无法确定 |
A.0个 | B.1个 | C.2个 | D.3个 |
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