《地面气象观测规范》规定，下垫面温度包括裸露土壤表面的地面温度、草面（或雪面）温度及最高、最低温度。
参考答案：对
5千克的海绵比5000克的黄金轻得多．______．
— By the way, where is Li Lei?
— He ___ the bookstore.[ ]
A. has been
B. has been to
C. has gone
D. has gone to
