多项选择题

Which of the following can be included in an offer? A.
price B.
quantity C.
terms of payment D.
time of shipment

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单项选择题

A.
B.
C.
D.

单项选择题

目前基因诊断常用的分子杂交不包括哪一项()

A.Southern印迹
B.Western印迹
C.Northern印迹
D.等位基因特异性寡核苷酸分子杂交