She is having an interview ______ Lily's grandpa now.[ ]
A. on
B. with
C. at
D. of
答案:B
以下关于锁的粒度叙述错误的是______。
A.施加X锁和S锁的数据项的大小称为锁的粒度
B.锁粒度与事务并发执行的程度和DBMS并发控制的开销密切相关
C.在关系数据库中,可以对数据页、索引和块等物理单元进行加锁
D.当锁粒度比较大时,事务的并发度高,但是系统开销比较大
请根据句意或括号中的中文提示、英文释义,写出句中所缺单词,使句子通顺。
(每小题1分,共5分)
小题1:We have a growing (人口) and therefore we need more food.
小题2:We all know that life is not always (平坦的).
小题3:As soon as I had made the final decision, I felt very (calm and not worried).
小题4:How can you (have enough money to buy something) such a large house?
小题5:I like black and red, but my favourite is blue.