Why isnt it important what McKay sees in the machine?
A．He doesn't like the machine.
B．An eye chart is better.
C．It's what the machine sees in him that is important.
D．The prototype doesn't work very well.

单项选择题高压设备的划分标准是()。

未分类题Which of the following titles is most appropriate to the text?A．The Failed Search for an Earthquake Prediction SystemB．The Merits of Trying to Predict EarthquakesC．The Debate over Earthquake Prediction SystemsD．The Drawbacks of Earthquake Prediction Systems

未分类题Which of the following best sums up activities within an ecosystem?A．Predator-prey relationships.B．Interactions among all members.C．Human-animal interactions.D．Human relationship with the environment.

未分类题学期教养工作计划的制定一般包括以下内容()。

未分类题We can infer that the definition of natural succession the author would support would be______.A．methods of preventing runoff of waterB．the relationship between the environment and living organismsC．the effect of living things on the environmentD．how environmental changes change life within an ecosystem