一个质地均匀的六面体骰子,六个面上的数字分别为1,2,3,3,4,5,投掷一次,向上的面出现数字3的概率是______.
P(数字3)=13.
故本题答案为:13.
It was in the school ____ he studied ten years ago ____ he gave a wonderful speech.
A.that; that
B.where; where
C.that ; where
D.where; that
右肺下动脉干宽度正常值是()
A.5mm
B.<l5mm
C.10mm
D.3mm
E.20mm