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【简答题】什么是遗传工程？简述将抗除草剂基因转到植物基因组的过程。
【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: Your passport? That's the one thing you mustn't leave behind! W: I know. I...
A.
She has packed it in one of her bags.
B.
She is going to get it at the airport.
C.
She has probably left it in a taxi.
D.
She is afraid that she has lost it.
【简答题】听下面5段对话，选出最佳选项。 1. Who has poor sight? [ ] A. Only Simon. B. Only Mary. C. Both Simon and Mary. 2. How old is Lucy? [ ] A. 16 B. 32 C. 3. How often does Lily go to the Reading Club? [ ...
【简答题】简述基因工程研究的基本技术路线。为什么说基因工程研究技术路线不是一成不变的?
【单选题】用测回法观测水平角,观测完上半测回后发现水准管气泡偏离 2格多,此情况应( )。
A.
继续观测下半测回
B.
整平后观测下半测回
C.
整平后全部重测
D.
前三种都行
【简答题】什么是基因工程?简述其操作过程。
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