皮皮学，免费搜题
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【单选题】
测定水分最为专一，也是最准确的化学方法是A.
直接干燥法
B.
减压干燥法
C.
卡尔 •费休法
D.
蒸馏法
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【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。
【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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