在小麦的生长过程中，必须循序渐进地通过光照和春化两个阶段（）
A.正确
B.错误
C.不准确
参考答案：B
-Hello. May I speak to Mr King.
-Sorry, he is _____ with his family in Hainan.[ ]
A. on the vacation
B. on vacation
C. in vacation
D. in the vacation
有抗震要求的房屋承重外墙尽端到门窗洞口的边最少应大于（）
A.0.5m
B.1m
C.1.2m
D.1.5m
