We worked hard to()a barren landscape into an area of beautiful pastureland.
A. transfer
B. transform
C. transmit
D. transport
查看答案
What could have()her ()this state of despair?
A. brought;to
B. brought;on
C. brought;about
D. brought;forward
He strode quickly down the street, ignoring the beggars who were () out their hands for money.
A. extending
B. stretching
C. lending
D. reaching
The past decade has witnessed an enormous worldwide political, economic and cultural()
A. tradition
B. transportation
C. transmission
D. transformation
腺病毒载体的特点中不包括()。
A. 所获病毒滴度高
B. 外源基因可瞬时高表达
C. 外源基因长期稳定表达
D. 基因组结构复杂
E. 能感染分裂或非分裂状态的细胞