27、 Black holes are formed after__________

A．the creation of new entities

B．an explosion of huge stars

C．the tiniest particle

D．the same amount of mass

E．the existence of black holes

F．a fraction of an inch

28、 When a large star explodes, the gravity compacts ever piece into_________

A．the creation of new entities

B．an explosion of huge stars

C．the tiniest particle

D．the same amount of mass

E．the existence of black holes

F．a fraction of an inch

29、 A newly formed black hole and the star it comes from are of__________

A．the creation of new entities

B．an explosion of huge stars

C．the tiniest particle

D．the same amount of mass

E．the existence of black holes

F．a fraction of an inch

30、 Albert Einsteins theory of relativity helps to prove__________

A．the creation of new entities

B．an explosion of huge stars

C．the tiniest particle

D．the same amount of mass

E．the existence of black holes

F．a fraction of an inch

下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定l个最佳选项。

【2013年职称英语考试《理工类A级》考试真题】相关文章：

★ 2011职称英语考试历年真题：理工A类完形填空

★ 职称英语考试题库2009理工类A级真题：词汇选项

★ 2011职称英语考试历年真题：理工A类阅读理解

★ 2010年职称英语考试真题理工类A级：完形填空

★ 2006职称英语考试理工类A级真题及答案

★ 2007职称英语考试理工类A级真题及答案

★ 2008职称英语题库理工类A级：真题及答案解析汇总

★ 2015职称英语考试真题及答案解析：理工A完形填空

★ 2010年职称英语考试真题理工类A级：参考答案解析

★ 2006职称英语题库理工类A级：参考答案