你能帮帮他们吗
____ (feel) cold,they made a fire____(warm) themselves up
1年前
____ UFO landed on Center Park and ______ alien got out of _
1年前
已知反应2KMnO4+16HCl(浓)=2KCl+2MnCl2+5Cl2↑+8H2O ,若有44.8L氯气(标况)生成
1年前
用递等式计算(能简便的要简便)1.224466×446688÷(112233×223344)
1年前
since i couldn't see anything through the microscope,____my
1年前