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对社会上的某些事件，以组织名义作出反应，以显示本组织的社会责任感，并引起公众共呜的公关广告是（）。

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水龙带是井下作业中进行循环施工的重要配件，其一端与（）的鹅颈管或活动弯头相连，另一端与立管或地面管线相连.

A view is created with the following statement:CREATE VIEW v1 AS SELECT col1, col2, col3, col4 FROM t1 WHERE col4 > 1000 WITH CHECK OPTIONWhat is the effect of the CHECK OPTION clause?（）

Any row inserted or updated through view V1 must meet the condition that col4 > 1000.
B. From now on, any row inserted or updated in table T1 must meet the condition that col4 > 1000, but existing rows in the table are not checked.
C. At view creation, DB2 will check the data in table T1, and if in any row doesn't meet the condition col4 > 1000, the view creation will be rejected.
D. Any row inserted or updated through view V1 must meet the condition that col4 > 1000 and no row in table T1 can be updated such that col4 <= 1000, but new rows in the table can be inserted with col4 <= 1000.

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认购C公司普通股10万股计划长期持有，每股面值1元，实际买价每股15元，其中包含每股已宣告发放但尚未收取的现金股利0.3元；另外支付相关费用6000元。该批股票的初始投资成本为（）。

A. 1000000元
B. 1476000元
C. 1500000元
D. 1506000元

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气动调节器要安装在垂直管道上。

A. 正确
B. 错误

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