【简答题】(本题共12分)已知 , ,且 (1)求 的值 (2)求
【简答题】因式分解:(本题共12分,每题4分). (1) (2) (3)
【单选题】《中国药典》规定,天然冰片的来源为()。
【单选题】Why are the teacups and teapot rinsed and heated with boiling water firstly?
A.
For cleaning the teacups and teapot.
B.
For washing the tea leaves.
C.
For enhancing the aroma of the tea.
D.
For removing the debris or bubbles.
【单选题】The teapot was ________ with hot water. [ ]
【单选题】低层次的环境生物技术是利用自然界的()功能来处理污染。
【单选题】A teapot is a vessel used for serving tea.
【简答题】The teapot is full of tea .同义句转换 The teapot -------- -------- ---------- tea.