单选题According to the Chemical Data Guide，which reactive group(s) is/are not compatible with the products polybutene and o-xylene? （）A Nitric acidB AmidesC Alcohols，glycolsD Phenols，cresols

A.menu

B.functions

C.data group

D.responsibility

E.functional group

A.GRANT ADD DATA ON TABLE tab1 TO GROUP tom appgrp

B.GRANT INSERT TO USER tom, GROUP appgrp ON TABLE tab1

C.GRANT INSERT ON TABLE tab1 TO USER tom, GROUP appgrp

D.GRANT ADD DATA ON TABLE tab1 TO USER appgrp, GROUP tom

A. ALTER DISKGROUP data CHECK;

B. ALTER DISKGROUP data CHECK DISK;

C. ALTER DISKGROUP data CHECK FILE;

D. ALTER DISKGROUP data CHECK DISK IN FAILURE GROUP 1;

According to the Chemical Data Guide，what does ethyl chloride produce when ignited?

A.Toxic fumes of oxides of nitrogen

B.Toxic fumes of lead

C.Poisonous phosgene gas

D.Poisonous chlorine gas

A.Transport

B.Network

C.Session

D.Data Link

Charts are subject to frequent correction according to ______.

A.Notices to Mariners

B.Mariner's handbook

C.Sailing Directions

D.Guide to Port Entry

A. It permanently switches to the low_group consumer group if the session exceeds 10,000 I/O requests or 2,500 MB of data transfer.

B. It performs the first 10000 I/O requests or 2,500 MB of data transfer in the LOW-GROUP consumer group, and then switches to the original group.

C. It switches to the LOW_GROUP consumer group if the session exceeds 10000 I/O requests or 2500 MB of data transfer and returns to the original group after the operation.

D. It switches to the LOW_GROUP consumer group if the session exceeds 10000 I/O requests or 2500MB of data transfer for queries, but not for data manipulation language (DML) operations.

According to the Chemical Data Guide，which reactive group（s）is/are not compatible with the products polybutene and o-xylene ________．

A.Nitric acid

B.Amides

C.Alcohols，glycols

D.Phenols，cresols