你能帮帮他们吗
I was reading ___ I heard someone calling my name.A while B
1年前
已知a∈R,命题p:实系数一元二次方程x2+ax+2=0的两根都是虚数;命题q:存在复数z同时满足|z|=2且|z+a|
1年前
1-3/2+5/6-7/12+9/20-11/30+13/42-15/56+17/72-19/90+21/110=?
1年前
90. ____in school uniforms, the students went to school.
1年前
——(至今),he has learnt about 1,000 English words
1年前