The author refers to a "conveyor belt " in line 16 in order to
A.illustrate the effects of convection in the mantle.
B.show how temperature differences depend on the positions of the continents.
C.demonstrate the linear nature of the Mid-Atlantic Ridge.
D.describe the complicated motions made possible by back-coupling.
E.account for the rising currents under certain mid-ocean ridges.
第1题
The underlined word "it" in the first paragraph refers to "______ ".
A.a doll
B.a book
C.one hand of the author
D.some unknown toy
第2题
When the author mentions "the tiny, dusty little places", he refers to ______.
A.very dirty bookshops
B.very old bookshops
C.very useful bookshops
D.very handy bookshops
第3题
According to the author, "class divisions" refers to______.
A.different opportunities for people
B.the rich and the poor
C.oppressor and the oppressed
D.genius and stupidity
第4题
The“pleasant day”to which the author refers was the period-when we_________.
A.did not feel guilty aboutwasting time
B.were able to act of ourown free will
C.seemed to have better weather
D.did not have SO manyenemies
第5题
The author refers to Carmen Lomas Garza's work as all of the following EXCEPT ______.
A.instructive
B.precise
C.detailed
D.naive
第6题
In paragraph six, the word "product" in the first line refers to______.
A.green banana
B.fruit
C.the author
D.the villagers
第8题
By "human intervention" (Para. 2), the author refers to .
A.the grasping of straightforward opportunities available
B.the adoption of smart sensing and network technology
C.the reduction of great energy waste in the environment
D.acts like turning off lights when no one is in the room
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