A、the declination is the opposite name to the latitude
B、the algebraic sum of the colatitude and declination exceeds 90
C、the observer is in high latitudes above either polar circle
D、the body is circumpolar
更多“A body can only be observed at lower transit when（）.”相关的问题
A、can be observed visually B、can be observed by radar C、can be located on the radar D、can be heard
A、A. Compression can be enabled at the table, tablespace, or partition level for direct loads only. B、B. Compression can be enabled only at the table level for both direct loads and conventional DML. C、C. Compression can be enabled at the table, tablespace, or partition level for conventional DML only. D、D. Compression can be enabled at the table, tablespace, or partition level for both direct loads and conventional DML.
A、The backup as copy can only be taken to disk B、The backup as copy can only be taken to tape C、Backup can be performed only when the instance is shutdown D、Backup will constitute all used and unused blocks in the database
A、The backup as copy can only be taken to disk B、The backup as copy can only be taken to tape C、Backup can be performed only when the instance is shutdown D、Backup will constitute all used and unused blocks in the database
A、A WHERE clause can be used to restrict both rows and groups. B、A WHERE clause can be used to restrict rows only. C、A HAVING clause can be used to restrict both rows and groups. D、A HAVING clause can be used to restrict groups only. E、A WHERE clause CANNOT be used in a query if the query uses a HAVING clause. F、A HAVING clause CANNOT be used in subqueries.
A、A WHERE clause can be used to restrict both rows and groups. B、A WHERE clause can be used to restrict rows only. C、A HAVING clause can be used to restrict both rows and groups. D、A HAVING clause can be used to restrict groups only. E、A WHERE clause CANNOT be used in a query of the query uses a HAVING clause. F、A HAVING clause CANNOT be used in subqueries.
A、A final method in class X can be abstract if and only if X is abstract. B、A protected method in class X can be overridden by any subclass of X. C、A private static method can be called only within other static methods in class X. D、A non-static public final method in class X can be overridden in any subclass of X. E、A public static method in class X can be called by a subclass of X without explicitly referencing the class X. F、A method with the same signature as a private final method in class X can be implemented in a subclass of X. H、A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.
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