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【多选题】
下列有关事故隐患的说法，正确的有( )。A.
事故隐患泛指生产系统中可导致事故发生的人的不安全行为、物的不安全状态和管理上的缺陷
B.
事放隐患分为一般事故隐患和重大事故隐患两种
C.
一般事故隐患是指危害和整改难度较小，发现后能够立即整改排除的隐患
D.
重大事故隐患是指危害和整改难度较大，应当立即全部停产、停业的隐患
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举一反三
【单选题】SELECT 各子句的执行顺序是( )。
A.
SELECT －FROM－WHERE－GROUP BY－ ORDER BY
B.
FROM －SELECT－WHERE－GROUP BY－ ORDER BY
C.
FROM －WHERE－SELECT－GROUP BY－ ORDER BY
D.
FROM －WHERE－GROUP BY－ SELECT－ORDER BY
【单选题】数据库执行SELECT查询语句时，各子句的书写先后顺序是：（）
A.
HAVING，WHERE，GROUP BY
B.
GROUP BY，HAVING，WHERE
C.
WHERE，GROUP BY，HAVING
D.
WHERE，HAVING，GROUP BY
【单选题】What is the challenge facing Stockholm County Council?
A.
How to control the growing number of intranet users.
B.
How to prevent teenagers in town from chatting on the Web.
C.
How to keep some information secret and accessible only to qualified people.
【单选题】设有查询语句: SELECT Sno,COUNT(*) FROM tb_sc WHERE grade>80 GROUP BY Sno; 各子句正确的执行顺序是
A.
①FROM ②WHERE ③GROUP BY ④SELECT
B.
①SELECT ②FROM ③WHERE ④GROUP BY
C.
①FROM ②GROUP BY ③WHERE ④SELECT
D.
①SELECT ②WHERE ③FROM ④GROUP BY
【简答题】在Excel 2007中,数据筛选的方法有()、()和()三种。
【单选题】The astronauts know ______ control the direction and the speed of the spaceship. [ ]
A.
how can they
B.
what's to
C.
how to
D.
what can they
【单选题】The passage mainly discusses how to control plant growth.
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】______ The author's purpose in writing this passage is to tell parents how to control and guide their children.
A.
T
B.
F
【简答题】How did the state control education?
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