+6的相反数是______,-15的相反数是______,-1的相反数是______.
+6的相反数是-6,
-15的相反数是15,
-1的相反数是1.
故答案为:-6,15,1.
Is there a hospital around ____ I can get some medicine for my wounded hand?
A.that
B.which
C.where
D.what
十二烷基磺酸钠(SDS)聚丙烯酰胺凝胶电泳过程中
A.分子体积最大的蛋白质最先洗脱下来
B.分子体积最小的蛋白质最先洗脱下来
C.不带电荷的蛋白质最先洗脱下来
D.带电荷的蛋白质最先洗脱下来