题目内容
向量组的基就是。
查看答案
搜索结果不匹配？点我反馈
更多问题
感染性微生物的危险度等级分为几类？
I级生物安全柜100%气流外排，II级生物安全柜30%气流外排，70%气流进入内循环。
Modern technology has a big influence on our daily life. New devices are widely used today. For example, we have to __(1)___the Internet every day. It is becoming more and more __(2)____ to our nearly everybody. Now it is time to think about how the Internet influences us. What ___(3)___it has on our social behavior.The internet has totally _____(4) our life, there is no doubt about that I think that the Internet has changed our life in a ____(5)way.
After driving for 30 miles,she suddenly _______that she is driving in the wrong direction.
微信支付 
支付宝支付