题目内容

连作造成减产的原因有()。

A. 病虫害严重发生
B. 杂草滋生
C. 理化性质恶化
D. 有毒物质积累
E. 缺乏某些营养元素

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创新发展扶贫小额信贷基本原则是什么?

管线停工置换的标准不正确的是()。

A. 干气系统采用氮气置换合格
B. 用高压氮气将反应系统置换合格
C. 用汽油置换分馏系统合格
D. 长短循环线都要用柴油置换合格

User A executes the following command to drop a large table in your database: SQL> DROP TABLE trans; While the drop table operation is in progress, user B executes the following command on the same table: SQL> DELETE FROM trans WHERE tr_type=’SL’; Which statement is true regarding the DELETE command()

A. It fails with a "Resource Busy" error.
B. It deletes the rows successfully because the table is locked in SHARE mode.
C. It fails to delete the records because the table is locked in EXCLUSIVE mode.
D. It deletes the rows successfully because the table is locked in SHARE ROW EXCLUSIVE mode.

客户的“理财金账户”能透支取款或消费吗?

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