染色体存在于 ( )中
A:细胞质
B:细胞膜
C:细胞核
D:液泡
— Linda, I called you this morning, but nobody answered the phone.
—I'm sorry. I ________ football with my friends then.
对于平抛运动,下列说法正确的是( )
对《游山西村》理解有误的一项是( )
读西亚地区图,完成下列问题: