用聚乙烯制作的矿泉水塑料瓶子，采用的成型工艺是（）。 ["注射","压缩","注射吹塑","挤压"]
简述植物排泄。
Which of the following describes the roles of devices in a WAN?（） ["A CSU\/DSU terminates a digital local loop","A modem terminates a digital local loop","A CSU\/DSU terminates an analog local loop","A modem terminates an analog local loop","A router is commonly consideredaDTEdevice","A router is commonly considereda DCE device"]
简述生态平衡的含义？
按凯恩斯的理论，下列正确的是（）。 ["高利率是有效需求不足的重要因素","高利率会提高收入","高利率会提高储蓄","高利率可以促进消费"]
鲕粒
