Lisa is a girl.
A:nine-year-old
B:nine years old
C:nine year old
D:nine-years-old
Please give this letter ____her.(介词)
根据图解,结合你学过的生物学知识,判断下列叙述错误的是( )
实验表明,磁体能吸引1元硬币,对这种现象解释正确的是( )