【简答题】Explain the two main causes of market failure and give an example of each.
【判断题】移动互联网有别于传统互联网的典型应用就是各种娱乐应用
【单选题】The main purpose of the passage is to
A.
explain why it is important to invest in space research
B.
explain how magnetic substorms interfere with satellite communications
C.
define magnetic substorms and identify a recent scientific experiment to study them
D.
compare two alternative approaches to the study of magnetic substorms
E.
demonstrate that unmanned probes are the best way to conduct research in space
【判断题】明代的朝天宫在三大节前作为文武百官演习朝拜礼仪的场所,有时也作为官僚子弟袭封前学习朝观礼仪的地方。
【简答题】Which are the two main types of (European) currncy option contract? Please explain in detail.
【简答题】互联网最典型的特征就是 { } 和 { } 。