因为除法与分数之间是除号相当于分数线,除法中的被除数相当于分数的分子,除法中的除数相当于分数的分母;
所以a÷b=ab;
故判断:正确.
I was just about to jump into the river________the guide stopped me saying "Dangerous".[ ]
A. while
B. when
C. if
D. because
脊髓炎临床有哪些分类