单项选择题

The principal subject discussed in this passage is ______.

A．the bleak future for the oceans
B．the resources in the oceans
C．the environmental damage to the oceans
D．the climatic changes caused by ocean currents

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热门试题

单项选择题

When a crisis Strikes, pain will most probably affect______.

A．knees
B．palms
C．eyes
D．lungs

单项选择题

Ways to deal with sickle-cell anemia crisis do NOT include______.

A．Drinking plenty of water
B．Taking pain-reliever drugs
C．Receiving blood transfusions
D．Taking injections of antibiotics