单项选择题

A．To work in mining operations.
B．To carry scientific supplies.
C．To cross the North American continent.
D．To help cultivate the frontier.
<上一题 目录 下一题>
热门 试题

单项选择题
A．They reduce a person’s appetite.B．They make a person less persistent in face of trouble.C．They make a person’s nervous system weak.D．They make a person more vulnerable to disease.
A．They reduce a person’s appetite.
B．They make a person less persistent in face of trouble.
C．They make a person’s nervous system weak.
D．They make a person more vulnerable to disease.
单项选择题
A．They help to cure anxiety.B．They help patients to gain insight into the cause of anxiety.C．They help to control anxiety.D．They help patients to work efficiently.
A．They help to cure anxiety.
B．They help patients to gain insight into the cause of anxiety.
C．They help to control anxiety.
D．They help patients to work efficiently.
相关试题