【单选题】科斯定理会建议政府怎样解决公共草地上的过度放牧问题:( )
A.
政府颁布规定,命令每个季度每亩土地上有多少牛羊可以放牧
【多选题】Which statements are correct about temporary tables()
A.
Indexes and views can be created on temporary tables.
B.
Both the data and the structure of temporary tables can be exported.
C.
Temporary tables are always created in a user’s temporary tablespace.
D.
The data inserted into a temporary table in a session is available to other sessions.
E.
Data manipulation language (DML) locks are never acquired on the data of temporary tables
【单选题】You lost a temporary file that belongs to the default temporary tablespace in your database. From the options provided, which approach would you take to solve the problem?()
A.
flash back the database
B.
import the temporary tablespace from the last export
C.
restore all the data files and temporary files from the last full database backup and perform a recovery
D.
not perform a recovery, but create a new temporary tablespace, make it the default temporary tablespace and then drop the old tablespace
【简答题】离心铸造密度较小的气体、夹渣等均集中于铸件内表面是由于___________________;而铸件组织致密,无缩孔、气孔、夹渣等缺陷,力学性能较好是由于___________________。
【单选题】(沈阳)对下列各句中使用的修辞手法,括号内的判断不正确的是:
A.
桂林的山真秀啊,像翠绿的屏障,像新生的竹笋,色彩明丽,倒映水中。(比喻排比)
B.
每条岭都是那么温柔,自山脚至岭顶长满了珍贵的树木,谁也不孤峰突起,盛气凌人。(拟人)
D.
因为红色是火的颜色,是血的颜色,是旗帜的颜色。(借代)
【单选题】(沈阳)对下列各句中使用的修辞手法,括号内的判断不正确的是:
A.
每条岭都是那么温柔,自山脚至岭顶长满了珍贵的树木,谁也不孤峰突起,盛气凌人。(比喻)
D.
威尼斯小艇行动轻快灵活,仿佛田沟里的水蛇。(比喻)
【单选题】One advantage of keeping a record of your spending is that ___________
A.
you will remember how much you have already spent
B.
you will know if you have spent more money than you planned
C.
you will be able to tell your family what should not be bought
D.
you will learn how to make a better budget next time