当我们浪费粮食时，老爷爷经常用唐代李绅的诗句来教育我们：来不枝春晓发眠足觉（）

A. 谁知盘中餐，粒粒皆辛苦
B. 春种一粒粟，秋收万颗子

“海风你轻轻地吹，海浪你轻轻地摇”是哪首著名歌曲的歌词？

冯小刚执导的电影《夜宴》中，“青女”的扮演者是哪位知名女演员？

下段食管括约肌（LES）有何功能

Some high-pitched sounds are inaudible to the human ear.Inaudible means（）

A. loud
B. not able to be understood
C. not able to be heard
D. not able to be felt

When international banks conduct daily trades of different currencies valuing in the millions of dollars（）

A. they are using the spot market
B. they are using the forward market
C. they are using the futures market
D. they are using the stock markets

Which enzymatic activity would be decreased by thiamine deficiency（）

A. α-ketoglutarate dehydrogenase complex
B. isocitrate dehydrogenase
C. malate dehydrogenase
D. fumarase

¿A qué puede referirse la palabra “teatro”（）

A. un lugar
B. un género literario
C. un arte escénico
D. un libro

球团二氧化硅=9.61%，氧化钙=0.42%，，炉渣二元碱度=1.08，求1000Kg球团需加石灰石量？（）

-nCoV的基因组为