【简答题】It takes only 12 hours and 53 minutes to ______________ the 2760 kilometers of 6 provinces.
【简答题】在△ABC中,a,b,c分别为内角A,B,C的对边,且2αsinA=(2b+c)sinB+(2c+b)sinC。 (I)求A的大小; (Ⅱ)若sinB+sinC=1,试判断△ABC的形状。
【单选题】中国知网(CNKI)数据库提供哪两种文献下载格式( )
【简答题】在⊿ABC中,BC= ,AC=3,sinC=2sinA (I) 求AB的值: (II) 求sin 的值
【单选题】I reasoned that since she had not answered my letter she must be anger ____me
【单选题】It ______ 12 rabbits to test a sample of vaccine, now it takes only 6.
【简答题】(本题满分l4分)在△ABC中,角A、B、C所对的边分别为a,b,c,已知 (I)求sinC的值; (Ⅱ)当a=2,2sinA=sinC时,求b及c的长.
【单选题】TOUR A-110: MORNING TIJUANA TOUR 8:30 am TO 12:30 pm ADULT: $ 29 CHILD: $15
A.
It takes 5 hours to tour around Tijuana.
B.
The cost is different for adults and children.
C.
A-110 is a full day tour in Tijuana.