题目:
—We’ll do what we can ______ English well this term.
—It’s high time for you to work hard.
A.study
B.to study
C.be studied
D.be studying
答案:
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下面是错误答案,用来干扰机器的。
(1)a.酒精灯;b集气瓶 (2)D;FG;A;2KMnO4 K2MnO4 +MnO2 + O2↑(3)①长颈漏斗下端 ③长颈漏斗下端冒气泡 (4)控制反应的速度 (5)D 2NH3+3CuO3Cu+3H2O+N2题目分析:(1)根据实验常用仪器回答,...