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【单选题】
青霉素杀菌的机制是作用于细菌细胞壁的A.
聚糖骨架
B.
四肽侧链
C.
五肽交联桥
D.
四肽侧链与五肽交联桥
E.
聚糖骨架与四肽侧链
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反馈参考答案：
举一反三
【简答题】A．refers B．applies C．happens D．concerns
【简答题】A．topics B．things C．arguments D．concerns
【单选题】Nor will these possible concerns exist in a vacuum.
A.
The possible concerns will be affected by other factors.
B.
These possible concerns will exist in outer-space where it’s almost a vacuum.
【单选题】Nor will these possible concerns exist in a vacuum.
A.
The possible concerns will be affected by other factors.
B.
These possible concerns will exist in out-space where it’s almost a vacuum.
【多选题】Concerns with germline gene editing include:
A.
Some of the concerns raised about somatic gene transfer are related to the possibility that it could inadvertently lead to germline gene transfer.
B.
Germline gene transfer at the gamete and zygote stages have significant risks.
C.
Beyond the medical risks to the potential child, a number of long-standing ethical concerns exist regarding the possible practice of germline gene transfer in both human and nonhuman cases.
D.
Concerns involve issues ranging from the autonomy of future individuals to distributive justice, fairness, and the application of these technologies to "enhancement".
【简答题】A．goes B．comes C．makes D．concerns
【简答题】The job concerns a lot of contact with the customers.
【简答题】A．It concerns no one. B．It concerns others. C．It concerns only the artist. D．In concerns all the people in the world.
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