单项选择题

A．Professor and student.
B．Doctor and patient.
C．Waiter and customer.
D．Clerk and customer.
<上一题 目录 下一题>
热门 试题

填空题
imprisoned
单项选择题
On the basis of their models, scientists are of the opinion that______.
A．the climate of the world should be becoming cooler
B．the new Ice Age will be delayed by the greenhouse effect
C．the man-made warming effect helps to increase the solar effects
D．it will take thousands of years for the inertia of the earth’’s climate to take effect
相关试题