油包水乳化钻井液的滤失量低,滤液主要是油而不是水。
参考答案:对
Bob and his sister _____ volleyball.[ ]
A. are
B. likes
C. like
D. plays
合理编制招标控制价、投标报价的基础是( )。
A.概算定额 B.施工定额C.预算定额 D.企业定额