A:2f(−π3)<f(π4)
B:2f(−π3)<f(−π4)
C:f(0)<2f(−π4)
D:f(π6)<3f(π3)
— You know, I met my girlfriend's parents for the first time only yesterday.
— ________? I thought you'd met them before.
时间/min
0
1
2
3
4
5
6
7
8
甲的温度/℃
35.0
40.0
44.8
49.5
54.2
58.4
62.6
66.9
71.0
乙的温度/℃
42.0
44.0
46.0
48.0
50.0
51.8
下列字形和划线字注音全部正确的一项是( )