砂浆按其所用胶凝材料的不同,可分为()。
A.水泥砂浆
B.石灰砂浆
C.混合砂浆
D.砌筑砂浆
参考答案:A, B, C
0.01mol某种有机物完全燃烧后,生成二氧化碳和0.54g H2O,则该有机物可能是
A.乙烯
B.乙烷
C.乙醇
D.乙酸
The Customs has the right to withhold the goods and articles connected () the smuggling cases.
A. for
B. from
C. with
D. within