A lot of technical problems have to be solved ______ this ne
| A lot of technical problems have to be solved ______ this new type of digital camera _______its appearance in market. |
| [ ] |
| A. when; makes B. until; will make C. before; makes D. after; will make |
可能相似的问题
你能帮帮他们吗
精彩回答
-
1年前
-
1年前
-
1年前
-
1年前
-
已知等差数列{an}的公差d≠0，且a1、a3、a9成等比数列，则
1年前