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单选题
The （）(双杆联吊) is that two booms are used with a single hook.
A
derrick
B
union purchase
C
topping lift block
D
crane
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ShroudsB
King postsC
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bittB
bollardC
capstanD
cleat
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多选题Which two statements about subqueries are true? （）AA single row subquery can retrieve data from only one table.BA SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.CA SQL query statement can display data from table B that is referred to in its subquery, without including B in its own FROM clause.DA single row subquery can retrieve data from more than one table.EA single row subquery cannot be used in a condition where the LIKE operator is used for comparison.FA multiple-row subquery cannot be used in an INSERT statement to insert multiple rows at a time.
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