【判断题】要让晶体管工作在放大状态,发射结应该正偏,集电结应该反偏。
【单选题】There are_____ people in the supermarket .I t is so crowded.
【单选题】The unity of the genetic code indicates( )
A.
The genetic code of all organisms is the same
B.
The nuclear genetic code of all organisms is the same
C.
The evolutionary process, the genetic code does not change
D.
All genetic information is regulated by the same factor
【单选题】Where is the supermarket?
A.
It's next to the bookstore.
B.
You can buy fruits here.
C.
The supermarket is very large.
【简答题】基因工程抗体(genetic engineering antibody)
【单选题】The supermarket is crowded. I _______. [ ]
A.
catch my mother's hand
B.
reach my mother by hand
C.
take my mother by the hand
D.
hold my mother in hand
【单选题】There are_____ people in the supermarket .I t is so crowded.
【简答题】什么是 基因工程制药( genetic engineering pharmaceutics ) 。
【单选题】I will show you _______ the supermarket is.