单选题：An electronic device has been developed to measure the weigh

题目内容：

An electronic device has been developed to measure the weight of certain Martian particles. A．Right
B．Wrong
C．Not mentioned

参考答案：

答案解析：

There isn't enough land to support human being because

There isn't enough land to support human being becauseA．most of the world's land

分类：理工类题型：单选题

Before you decide on a vocation, it might be a good idea to consult a few good f

分类：理工类题型：单选题

Below 600 feet ocean waters range from dimly lit to completely dark.A．inadequate

分类：理工类题型：单选题

回答(65)题A．styles B．sites C．costs D．standards

分类：理工类题型：单选题

回答(60)题A．unless B．until C．after D．before

分类：理工类题型：单选题