基准点是变形测量的基准,每个工程一般至少应有()个基准点。
A、2
B、3
C、4
D、5
参考答案:B
He told us that the best way to ______ respect was to devote ourselves to ______ high grades.
A.earn; achieve
B.earn; achieving
C.earning; achieve
D.earning; achieve
A.经济
B.人类
C.水
D.自然