exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.
(A) exist at the core of nearly all galaxies and the mass of each black hole is proportional to
(B) exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of
(C) exist at the core of nearly all galaxies, and that the mass of each black hole is proportional to
(D) exists at the core of nearly al galaxies. and that the mass of each black hole is proportional to that of
(E) exists at the core of nearly M galaxies and the mass of each black hole is proportional to that of
132. Almost like clones in their similarity to one another, the cheetah species' homogeneity makes them especially vulnerable to disease.
(A) the cheetah species' homogeneity makes them especially vulnerable to disease
(B) the cheetah species is especially vulnerable to disease because of its homogeneity
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雅思(英语:IELTS),全称为国际英语测试系统(International English Language Testing System),是著名的国际性英语标准化水平测试之一。
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The Test of English as a Foreign Language,简称TOEFL
是由美国教育测验服务社(ETS)举办的英语能力考试,中文音译为“托福”。
Scholastic Assessment Test
中文名称为学术能力评估测试。由美国大学委员会(College Board)主办,SAT成绩是世界各国高中生申请美国名校学习及奖学金的重要参考。
Graduate Record Examination
中文名称为美国研究生入学考试,适用于除法律与商业外的各专业,由美国教育考试服务处(Educational Testing Service,简称ETS)主办.