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【单选题】
船舶的______尾轴承是采用油润滑的。A.
白合金
B.
橡胶
C.
滚动式
D.
白桦层
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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】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】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。
【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】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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