题目内容

有关嘌呤核苷酸的合成,错误的叙述是

A. 由Asp提供氨基使IMP生成AMP
B. 由Asn提供氨基使IMP生成GMP
C. 由G1n提供氨基使XMP生成GMP
D. IMP是GMP、AMP的前体

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Global trade has been around for centuries. In the past, the corporations and countries that benefited from global trade were largely content to treat vast parts of the world as places to ___________________.Most foreign investment was between relatively _____________. U.S technology, companies and money was often _____________________ of this movement.

However,the past decades have witnessed the rise of ___________. The developed world is_____________ China's and India's door ---and the Chinese and Indian companies, in turn, have started to look overseas for _______________.

Goldman Sachs predicted that four economies — Russia, Brazil, India and China — will become _____________ in the world economy than widely expected, based on projections of __________________, with China potentially __________ Germany this decade. By 2050, these four newcomers ________________ all but the U.S. and Japan from the top six economies in the world.

大型实验实验室要求()设计。

A. 子母门
B. 双开门
C. 单门
D. 多门

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