A:A nurse.
B:A doctor.
C:A bank clerk.
一个多项式减去x3-2y3等于x3+y3,则这个多项式为____.
选择正确的读音
栽树(zhāi zāi)____ 玩耍(shuǎ shuā)____
古诗(sī shī )____ 挤满(jǐ jī)____
树梢(shāo sāo)____ 岁月(suì siù)____
-What do you hear? -I hear a duck.