【单选题】有一多肽经酸水解后产生等摩尔的Lys,Gly和Ala。如用胰蛋白酶水解该肽,仅发现有游离的Gly和一种二肽。下列多肽的一级结构中,哪一个符合该肽的结构?()
A.
Gly-Lys-Ala-Lys-Gly-Ala
【简答题】翻译下列句子,注意主从句换位。 Unlike many other industrialized countries, the United States is largely self-sufficient in raw mateirals. Japan and Western Europe, which depend heavily on food imported from the Unit...
【简答题】开关磁阻电动机采用(),转子既无绕组也无永磁体,定子极上绕有()绕组,径向相对的两个绕组串联或并联在一起,构成一个两极磁极,称为“一相”,绕组为()。
【单选题】为增大扭矩,汽车起动机通常采用( )个磁极。
【判断题】为增大磁场强度,大多数起动机采用4个磁极, 在其上面装有磁场线圈,相对的是同极,相邻的是异极。
【单选题】Unaltered folk cultures no longer exist in industrialized countries such as the United States and Canada. Perhaps the nearest modern equivalent in Anglo-America is the Amish, a German American farming...