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【单选题】
判断病毒有无包膜的依据是A.
培养有无细胞病变
B.
对酚类是否敏感
C.
对乙醚是否敏感
D.
超速离心时沉降速度不同
E.
对pH5.0敏感
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【简答题】根据上下文，从方框中选择适当的选项将对话补充完整，有两个多余的选项。 A. And these are my grandparents B. Thank you C. I'm OK D. Nice to meet you, David E. Yes, we are F. He is my friend G. How do you do Tim: How do you do, David! Bruc...
【简答题】高速铁路接触网正线和联络线的接触线高度为（）米。
【简答题】MODEL 1: Where are you off to? Laura: Dave, 1 ? David: I’m heading for the library. Max: Hey, 2 returning these books for me? They’re du...
【简答题】阅读理解。 Hello, nice to meet you. My name is David and I'm a student at Beijing International School. This is a photo of my family. These are my parents and my little sister is behind me. We're from Amer...
【单选题】高速接触网对接触线设置的附加预驰度为
A.
（ 1/500 ～ 1/1000 ） * 跨距
B.
（ 1/50 ～ 1/100 ） * 跨距
C.
（ 1/5000 ～ 1/10000 ） * 跨距
D.
（ 1/1000 ～ 1/5000 ） * 跨距
【简答题】用所给单词的适当形式填空。 1. —Where ________ (be) the notebooks? —They are in the backpack. 2. Look! The ________ (key) are under the desk. 3. Jim, please ________ (take) these things to your brother. 4. Can you ...
【简答题】完形填空。 This is my __1__ . My grandpa's name is Harry Green. My __ 2 __ is Mary Green. These are my __ 3 __. My father's name is David Green, __ 4 __ is a doctor. My mother's name is Helen Green, She is...
【简答题】用动词be (am, is, are)填空。 1. She _____ a teacher. Her name _____ Mary. 2. I _____ a boy. My name _____ Li Ming. 3. Who _____ this girl? She _____ Li Mei. 4. How old ______you? I _____ eleven. 5. What _...
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