已知|a|=6，|b|=3，a与b的夹角为60º，求a与b的内积（）

What'sthemeaningoftheword"password"?

What'sthemeaningoftheword"spirited"?

What'sthemeaningofthephrase"overandover"?

What'sthemeaningofthephrase"bynow"?

What'sthemeaningoftheword"eyesight"?

What'sthemeaningoftheword"laughter"?

TranslatethesentenceintoChinese.Ican'tagreemore.

What'sthemeaningoftheword"advice"?

中国古代四大发明包括火药、指南针、造纸术、印刷术。

Translatethefollowingsentenceintochinese.Thebankisnexttotheschool.

Wealmost()notimeforfun.

what'sthemeaningof"trafficjam"?

Myparentsarebothwiththeirwork..

what'sthemeaningof"becrazyabout"?

所研究对象的总体叫做个体