运载火箭一般采用高性能的低温推进剂——液氧和液氮。
参考答案：错
----Do you like going hiking on Sundays?
----No, I would rather books at home than hiking
A.to read, go B.read, go C. to read, to go
同底等高的平行四边形面积相等，周长也相等。[ ]
