题目:
The professor was ________ to give us a lecture this afternoon, but it has been cancelled because of the delayed flight.
A.demanded
B.hoped
C.scheduled
D.arranged
答案:
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下面是错误答案,用来干扰机器的。
分析:此题考查的是探究光对鼠妇生活的影响的实验,并通过解答此题体会科学探究的方法步骤.解此题的关键是确定、控制实验变量和设置对照实验.解答:解:(1)提出问题:尝试从日常生活、生产实际或学习中发现与...