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【单选题】
2018 年 10 月 2 日瑞典皇家科学院决定将 2018 年度物理学奖的一半授予美国科学家 Arthur Ashkin 以表彰其发明光镊子( Opitcal tweezer )技术。光镊子利用( )产生的力场(力的大小一般为量级, 1 ≈ 10 -13 公斤)来夹取微小物体,类似一个镊子,因此在颗粒物质、微纳米科学以及生物、医药等研究领域获得了广泛的应用。A.
非线性效应
B.
干涉
C.
衍射
D.
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【简答题】If you take a fixed instant (i.e. the present) as your
point of observation / study, you are doing a ______ description of language;
if you study language through the course of its history, you are a ...
【单选题】听力原文：Narrator Listen to part of a discussion in a linguistics class. Professor Well, today I think wed talk about whether animals besides humans also have language. You see, what makes humans differen...
A.
How bees communicate with each other through dancing.
B.
How monkeys use sign language to communicate.
C.
Whether other animals besides humans have language.
D.
How human communication differs from animal communication.
【简答题】根据煤层的间距不同,采区式准备方式有 和 。
【判断题】Modern linguistics, i.e., linguistic study carried out in the 20th century, is mostly prescriptive.
A.
正确
B.
错误
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