A:糖原和脂肪
B:DNA和酶
C:淀粉和RNA
D:蛋白质和酒精
在等腰三角形ABC中,∠A=100°,则∠B=____ 度。
下列有关人口问题的表述正确的是( )
It was snowing hard_______we had to stay at home and watch TV.