【单选题】下列说法不正确的是()
A.
双水相萃取法主要用来分离大分子生物物质,特别是胞内酶的提取
B.
当溶液中的ph等于某蛋白质的等电点pI时,该蛋白质的溶解度最大
C.
通过合理调整双水相组成,可以把目标产物分配在上相也可在下相
D.
膜的浓差极化是一个可逆过程,膜的污染是不可逆的
【简答题】What does the education in the United States encourage?
【简答题】七情内伤的致病特点包括()、()和情志波动,影响病情。
【单选题】From the passage, we can learn that the key to improve the education in the U.S. is to______.
A.
raise teachers' salary in remote areas
B.
provide well-trained teachers for all students
C.
rearrange the curriculum so that teachers can have a break
D.
allow students to choose their favorite teachers
【简答题】Z值越大,一般说明微生物的耐热性越( );D值越大,表示微生物的耐热性越( )。
【单选题】According to the text, the author seems to be
A.
against the education in the very early historic times.
B.
in favor of the educational practice in primitive cultures.
C.
positive about our present educational instruction.
D.
quite happy to see an equal start for everyone.