急性一氧化碳中毒损害的主要系统是（）
A.中枢神经系统
B.心血管系统
C.呼吸系统
D.血液系统
E.消化系统
参考答案：D
一只大熊猫一天要吃105千克食物．饲养员准备了1吨食物，够大熊猫吃一周吗？
鼓励合营企业向中国境外销售产品。( )
A. An equity joint venture shall encourage to market its products outside China.B. An equity joint venture shall be encouraged to marketing its products outside China.C. An equity joint venture shall encourage to market its products from outside China.D. An equity joint venture shall be encouraged to market its products outside China.
