There __________ a pen and two pencils in the bag. [ ]
A. is
B. are
C. has
答案：A
以获取原材料或其他生产投入为盈利目的的投资是( )
A．横向投资 B．纵向投资 C．前向投资 D．后向投资
通过经常发生塌方、泥石流的山区地段，避免停车。
