【单选题】在△ABC中,若b=12,A=30°,B=90°,则a=( )
【单选题】在△ ABC 中,若 a = 4 , b = ,∠ A = 30 °,则∠ B 等于
【简答题】II. Fill in theblanks with proper words: (A) Dear Sirs , You wererecommended to us by London Chamber of Commerce. We are _____ in your leatherboots. We are wholesalers in the North of England and we t...
【单选题】Our civilization can not be thought of as ____ in a short period of time.
【单选题】在△ABC中,若 A=60°,BC=4 3 ,AC=4 2 ,则角B的大小为( )