【简答题】在钻壳体与其相配衬套之间的骑缝螺纹底孔时,孔中心的样冲眼要冲在()
【单选题】在钻壳体与其相配衬套之间的骑缝螺纹底孔时,由于两者材料不同,孔中心的样冲眼要打在 。
【简答题】I don't want to sound ______ but I always finish everything on time. (boastful, boastfully)
【简答题】I don't want to sound ______(boastfully) but I always finish everything on time.
【单选题】听力原文:My boss keeps asking me to work overtime but I always say no because I don't want to jeopardize my studies. But I'm starting to waver. What will the speaker probably do?
A.
He will refuse to work overtime.
B.
He will quit this job.
C.
He will probably say yes to his boss and work overtime.
D.
He will have to give up his studies.
【简答题】锌、碳酸钙、氧气、盐酸、硫酸铜溶液五种物质中选出1种或2种为反应物,按下列反应类型各写1个化学方程式: (1)化合反应______; (2)分解反应______; (3)置换反应______; (4)复分解反应______.