We are not ready to go into production yet.The new switch mechanism isn't fully__________.( )
A:worked out
B:left out
C:turned out
D:tested out
下图是沿某经线我国局部地区地形剖面图(实线表示),①②③曲线代表一月平均气温、年降水量、日平均气温≥10℃的积温,读图回答题。①②③三条曲线分别代表:
下列叙述中,正确的是( )