套索(1ariat)
参考答案:前体mRNA在剪接过程中,由内含子的5’端和3’端经2’,5’-磷酸二酯键而形成的带尾巴的环状结构,因其形似一根套马索,故称套索。
The suggestion ________ by the teacher is available.
A.put forward
B.putted forward
C.putting forward
D.put on