题目内容
（请给出正确答案）
A．To indicate how one can get better service.
B．To explain the derivation of the word "tip".
C．To illustrate why difficult customers give bad tips.
D．To put forward reasons for a salary increase.
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更多“A．To indicate how one can get …”相关的问题
A．To show respect to this modern American hero.
B．To indicate how important Dr. Martin Luther King is.
C．To illustrate what a modem hero is.
D．To set an example for American modem heroes.
A．To indicate how climbers communicated.
B．To show that climbers enjoyed many comforts.
C．To show that modern telephones work at high altitudes.
D．To emphasize how small some equipment had become.
A．To indicate how climbers communicate.
B．To show that climbers enjoyed many comforts.
C．To show that modern telephones can work at high latitude.
D．To emphasize how small equipment had become.
A．To indicate how climbers communicated
B．To show that climbers enjoyed many comforts
C．To show that modem telephones work at high altitudes
D．To emphasize how small some equipment had become
Why does the author compare archeology to doing a jigsaw puzzle？
A．To indicate what archeology contributes to us.
B．To show how difficult doing archeology is.
C．To explain the challenge and charm of archeology.
D．To display how people do archeology research.
Why is the animal "pigeon" mentioned in the passage？
A．To give an example that both human beings and animals can recognize faces.
B．To tell how a skilled writer could describe all the features of different people.
C．To indicate how pigeons and people look different.
D．To show how faces are like fingers.
According to the passage, why do ants use different compounds as trail pheromones？
A．To reduce their sensitivity to some chemicals
B．To attract different types of ants
C．To protect their trail from other species
D．To indicate how far away the food is
A．To give an example that both human beings and animals can recognize faces.
B．To tell how a skilled writer could describe all the features of different people.
C．To indicate how pigeons and people look different.
D．To show how faces are like fingers.
Why does the professor say this:
A．To make sure the woman does not misunderstand how cultured pearls are made.
B．To indicate that the manufacture of cultured pearls is still an inexact science.
C．To express uncertainty about the process used to manufacture cultured pearls.
D．To define the technical differences in the formation of natural and cultured pearls.
Why does the professor mention the Moons mantle？
A．To explain how scientists are able to estimate the age of meteor impacts
B．To indicate what part of the Moon could provide key evidence about the Moon"s composition
C．To explain how scientists know that meteors penetrate the Moon"s crust
D．To point out an obvious difference between the Moon and Earth
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