[单项选择]The example of the Apollo Ⅱ moon launch is given to illustrate that______.

[单项选择]The example of the Apollo Ⅱ moon launch is given to illustrate that ______.

[单项选择]The example of the Apollo II moon launch is given to illustrate that ______.

[单项选择]The example of rite Apollo II moon launch is given to illustrate that ______.

[单项选择]The second injection should have been given once the first drug had {{U}}taken effect{{/U}}.
A. taken place
B. injected
C. worked out
D. worked

[单项选择]The economic situation (will improve) given that there is (forecast to be) less (unemployment) and closures than (in previous years).
A. will improve
B. forecast to be
C. unemployment
D. in previous years

[单项选择] Given table T1 has column I1 containing the following data: I1 1 2 3 4 If the following sequence of SQL statements is applied within a single unit of work: UPDATE t1 SET i1 = 3 WHERE i1 = 2; S AVEPOINT s1 ON ROLLBACK RETAIN CURSORS; UPDATE t1 SET i1 = 5 WHERE i1 = 3; SAVEPOINT s2 ON ROLLBACK RETAIN CURSORS;INSERT INTO t1 (i1) VALUES (6); ROLLBACK TO SAVEPOINT s1; UPDATE t1 SET i1 = 2 WHERE i1 = 4; COMMIT; What is the expected sequence of values returned from?（） SELECT i1 FROM t1 ORDER BY i1
A. 1, 2, 3, 3
B. 1, 2, 2, 4
C. 1, 2, 3, 3, 6
D. 1, 2, 2, 5, 6

[单项选择]Given that t1 is a reference to a live thread, which is true?（）
A. The Thread.sleep() method can take t1 as an argument.
B. The Object.notify() method can take t1 as an argument.
C. The Thread.yield() method can take t1 as an argument.
D. The Thread.setPriority() method can take t1 as an argument.
E. The Object.notify() method arbitrarily chooses which thread to notify.

[单项选择] Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 1 4 1 3 1 2 Table T2: C1 C2 1 1 1 2 1 3 Which of the following queries will return only those rows that exist in both T1 and T2?（）
A. SELECT * FROM t1 UNION SELECT * FROM t2
B. SELECT * FROM t1 UNION DISTINCT SELECT * FROM t2
C. SELECT * FROM t1 INTERSECT SELECT * FROM t2
D. SELECT * FROM t1 WHERE (c1,c2)= (SELECT c1,c2 FROM t2)

[单项选择]The students were given complimentary passes for the new movie.
A. inexpensive
B. free
C. expensive
D. good

[单项选择] Given the following requirements: Create a table to contain employee data, with a unique numeric identifier automatically assigned when a row is added, has an EDLEVEL column that permits only the values 'C', 'H' and 'N', and permits inserts only when a corresponding value for the employee's department exists in the DEPARTMENT table. Which of the following CREATE statements will successfully create this table?（）
A. CREATE TABLE emp ( empno SMALLINT NEXTVAL GENERATED ALWAYS AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3) NOT NULL, edlevel CHAR(1), PRIMARY KEY emp_pk (empno), FOREIGN KEY emp_workdept_fk ON (workdept) REFERENCES department (deptno), CHECK edlevel_ck VALUES (edlevel IN ('C','H','N')), );
B. CREATE TABLE emp ( empno SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3), edlevel CHAR(1), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY (workdept) REFERENCES department (deptno), CONSTRAINT edlevel_ck CHECK edlevel VALUES ('C','H','N') );
C. CREATE TABLE emp ( empno SMALLINT NEXTVAL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3) NOT NULL, edlevel CHAR(1) CHECK IN ('C','H','N')), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY department (deptno) REFERENCES (workdept) );
D. CREATE TABLE emp ( empno SMALLINT NOT NULL GENERATED BY DEFAULT AS IDENTITY, firstname VARCHAR(30) NOT NULL, lastname VARCHAR(30) NOT NULL, workdept CHAR(3), edlevel CHAR(1), CONSTRAINT emp_pk PRIMARY KEY (empno), CONSTRAINT emp_workdept_fk FOREIGN KEY (workdept) REFERENCES department (deptno), CONSTRAINT edlevel_ck CHECK (edlevel IN ('C','H','N')) );

[单项选择]Do you remember ________ you have given this box to

[单项选择]I regret I haven't given you enough help.
A. saying
B. having said
C. to say
D. to have said

[单项选择]The leader says he hasn't given much thought to the demonstrations planned against him during his state visit to Britain next week．
A. 这位领导人说他并未过多考虑下周对英国国事访问期间针对他策划的示威游行。
B. 这位领导人对下周访英期间为他周密筹划的示范活动评价不高。
C. 这位领导人就要对英国进行国事访问，对于下周为他策划的示威游行他说并未过多考虑。
D. 这位领导人说他并未想到下周英国国事访问期间会为他安排示范活动。