下列哪个数可能是近似数3.2的真实值[ ]
A.3.149
B.3.25
C.3.19
D.3.26
答案：C
人体健康离不开化学，下列叙述错误的是（ ）
What disappointed us was that their determination finally ___.
A．gave off
B．gave out
C．gave up
D．gave in
