下面哪个试剂能完成下面的转化?https://image.zhihuishu.c...b4b5e00f7d09e914.png
举一反三
- 下面哪个试剂能完成下面的转化?[img=842x202]17a4127814471e5.png[/img]
- 下面哪个试剂能完成下面的转化? A: 全部都能 B: LiAlH4,乙醚 C: Zn(Hg),HCl,回流 D: Pt/H2
- 下面哪个试剂能完成下面的转化?[img=842x202]17869bd6b240b74.png[/img] A: 全部都能 B: LiAlH4, 乙醚 C: Zn(Hg), HCl, 回流 D: Pt/H2
- You need to restore your database back to 9/30/2008 at 18:00. In what order would you run the following commands to compete this task?() a. restore controlfile until time `09/30/2008:18:00:00’ b. restore database until time `09/30/2008:18:00:00’ c. restore spfile until time `09/30/2008:18:00:00’ d. recover database until time `09/30/2008:18:00:00’ e. alter database open resetlogs f. alter database open A: b, d, e B: b, d, f C: c, a, b, d, e D: c, a, b, d, f E: a, b, d, e
- 下面能够构成大三和弦的是哪几个音 A: 7 B: C: 2 D: E: 4 F: 4