单项选择题

How much did the triplet boys weigh when they were born

A．They were about 2.5 pounds.
B．They were about 3.2 pounds.
C．They were about 3 pounds.
D．They were about 3.5 pounds.
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单项选择题
The missing phrase in the incomplete sentence The dog’s-well, we don’t known do we (paragraph 3) refers to______.
A．color blindness
B．depth perception
C．perception of the world
D．concern for our perceptions
单项选择题
According to Uriel Safriel, what is the important force that drivers Israeli scientists to develop desert aquiculture as well as agriculture technologies
A．The fact that Israel is a country where fresh water is scarce and valuable.
B．The fact that Israelis are forced to wring food from arid lands.
C．The Israeli determination to reconstruct their country.
D．The Hebrew belief that desert is a reconstruct their country.
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