单项选择题

在()中，移动投影面时，投影随之改变。

A.中心投影法
B.平行投影法
C.以上选项都对
D.以上选项都不对

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Which of the following is a cause for the explosion of the reservation cigarette sales?
A．The New York state's policy support.
B．The increase in national cigarette taxes.
C．The $150 million investment from the state.
D．The non-Indians' abandonment in cigarette sales.

A.The
B.
B．The
C.
C．The
D.
D．The
E.

单项选择题

Many children in developing countries can not go to school, because of _______.

A、property
B、sword
C、trace
D、poverty