题目内容

The film______next week is The Deep Impact.

A. showing
B. to have beenshown
C. beingshown
D. to beshown

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When___________from the hill, the lake looks beautiful.

A. seeing
B. being seen
C. seen
D. to see

Study the dialogue “Thank You for the Beautiful Flowers”and finish the tasks.[音频]Thank You for the Beautiful FlowersJoyce:Hello, Mary!Mary:Hi, Joyce. How are you1.________now?Joyce:Oh, much better. Thank you. And thank you very much for the roses. They are so lovely!Mary:I'm2._you like them. They are from my own garden.Joyce:Yes, I know. Some of the flowers opened this morning, so beautifuland3._ .Mary:I know you love flowers, and I hope you'll4._keeping them.Joyce:I sure will. You are always so 5. _______, Mary.Mary:I'm glad you like the flowers.

DAC是将（）量转换成（）量的器件，ADC是将（）量转换成（）量的器件。

如何用化学方法区别盐酸普鲁卡因和盐酸利多卡因？