贵金属冲正的交易码是（）。A.1251 B.1252 C.1253 D.1259_爱下问搜题

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问题单项选择题

贵金属冲正的交易码是（）。

A.1251

B.1252

C.1253

D.1259

答案

参考答案：D

填空题

根据句意，从方框内选择合适的情态动词完成句子。

must, may, can, could, might, can't

1. The brown wallet           be Tom's or Bill's. They both like brown.
2. I haven't seen Alice for several years. She           be a big girl now.
3. —Whose jeans are these? I found them on the chair in the living room.
    —They           be mine. I put my jeans on the bed.
4. —          the woman there be our math teacher?
    —She          be, but I'm not sure.

单项选择题 A1/A2型题

对原发性肝癌的早期诊断最有价值的是（）

A.LDH

B.GGT

C.A／G

D.AFP

E.CEA