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举一反三
【单选题】In the story of RESURRECTION MARY, Mary died because she ____.
A.
was locked inside the cemetery
B.
got lost in the woods
C.
forgot to take her medicine
D.
was in a car accident
【单选题】用测回法观测水平角,测完上半测回后,发现水准管气泡偏离2格多,在此情况下应
A.
继续观测下半测回
B.
整平后观测下半测回
C.
继续观测或整平后观测下半测回
D.
整平后全部重测
【简答题】什么是基因工程？简述基因工程的主要操作步骤。
【简答题】简述什么是基因工程?
【单选题】听力原文：M: Mary, I hope you are packed and ready to leave. W: Yes, I'm packed, but not quite ready. I can't find my passport. M: Passport? That's the one thing you mustn't leave behind. W: I know. I have...
A.
Have lost it.
B.
Have not got it ready.
C.
Forget which bag it's in.
D.
Don't know how to use it.
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