【简答题】在下面指出的pH下,下述蛋白质在电场中相哪个方向移动,即向正极、负极还是不动? (1)血清蛋白,pH5.0; (2)β-蛋白,pH5.0和7.0; (3)胰凝乳蛋白酶原,pH5.0、9.1和11。
【多选题】数控车床刀架拆卸过程包含以下哪些方面()
【单选题】婴儿,男,胎龄280天,出生体重3.7kg,查其体重位于同胎龄体重的第82百分位,该新生儿属于
【简答题】We are still students now. We have to ____ our parents to live and to study. (依靠)
【简答题】We are still students now. We have to ______________ (依靠)our parents to live and to study.
【简答题】For our homework tonight, we have to write a______(describe) of the street where we live.