题目内容

下列对放射受体分析的基本特点的描述,错误的是()

A. 受体是细胞的生物活性部分,测定结果反映的是受体容量
B. 受体的种属特异性不强,为制备受体提供了方便
C. 受体通常有两个以上结合位点(高亲和力低容量和低亲和力高容量)
D. 受体制备较复杂,保存期较短,批间变异大,常规使用困难
E. 放射受体分析是竞争性结合分析法

查看答案
更多问题

You want to import schema objects of the HR user using Oracle Data Pump from the development database,DEVDB, to the production database, PRODDB. A database link devdb.us.oracle.com is created betweenPRODDB and DEVDB. You execute the following command on the PRODDB database server:$ impdp system/manager directory = DB_DATAdumpfile = schemas.datschemas = hr flashback_time = "TO_TIMESTAMP(’25-08-2007 14:35:00’, ’DD-MM-YYYY HH24:MI:SS’)"The command fails displaying the following error:ORA-39001: invalid argument valueORA-39000: bad dump file specification ORA-31640: unable to open dump file "/home/oracle/schema/schemas.dat" for read ORA-27037: unable toobtain file status What would you do to overcome the error()

Add the user, SYSTEM, to the schemas option.
B. Add the network_link = devdb.us.oracle.com option.
Change the dumpfile option to schema.dat@devdb.us.oracle.com.
D. Replace the schemas option with the network_link = devdb.us.oracle.com
E. Replace the dumpfile option with the network_link = devdb.us.oracle.com

选择装配法解尺寸链有()选配法和()选配法两种。

下列哪一种酶不参与血小板的花生四烯酸代谢过程()

A. 激肽释放酶
B. 环氧化酶
C. 血栓素合成酶
D. 磷脂酶A2
E. cAMP

当超声波经过声阻抗相差较大的介质形成界面时()。

A. 穿透力增强
B. 分辨率增强
C. 被反射的声能增多
D. 被吸收的声能增多
E. 混响增强

答案查题题库