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【简答题】
简述PCR引物设计的原则。
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反馈参考答案：
举一反三
【简答题】旅游安全事故是指在旅游活动的过程中．涉及旅游者人身、______的事故．
【单选题】We never needed to ask him for help, ______?
A.
did we
B.
didn't we
C.
needed we
D.
needn't we
【单选题】What is MTI ().
A.
The foot/tons needed to trim the vessel by 1 inch
B.
The foot/tons needed to trim the vessel by 1 foot
C.
The moments needed to trim the vessel by 1 centimeter
D.
The amount of vessel will trim when loading 100 tons 100 feet from the tipping Center
【简答题】– I didn't know my identity card was needed, sir. – ________________________________ A: Sorry, but that's no excuse. B; I don't believe you. C; How dare you say that?
【单选题】If the magazine is online, paper _______ .
A.
won’t need
B.
doesn’t need
C.
won’t be needed
D.
hasn’t needed
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