题目内容

麻黄碱、烟碱具有挥发性，可用( )法提取；咖啡因具有( )性。

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Choose the most appropriate word or phrase to complete each of the following sentences.The claims have received independent _______ from a team of experts.

A. contamination
B. confirmation
C. adolescence
D. nonsense

The Prime Minister is to meet his European _______ to discuss the war against drugs.

A. disbelief
B. counterpart
C. fitness
D. mortality

The aim is to promote closer economic _______.

A. humidity
B. integration
C. pedestrian
D. legibility

It’s difficult to _______ an animal right after rain.

A. appear
B. confess
C. track
D. swell