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听力原文: 'All work and no play makes Jack a dull boy' is a popular saying in the United States. Other countries have similar sayings. It is true that all of us need recreation. We cannot work all the time if we want to maintain good health and enjoy life. Everyone has his own way of relaxing. Perhaps the most popular way is to participate in sports. There are team sports such as baseball, basketball and football. There are individual sports such as golf and swimming. In addition, hiking, fishing, skiing and mountain climbing have a great attraction to people who like to be outdoors. Not everyone who enjoys sporting events likes to participate in them. Many people prefer to be spectators, either by attending the game in person, watching them on television, or listening to them on the radio. When there is an important baseball game or boxing match it is almost impossible to get tickets everybody wants to attend. Chess, card-playing and dancing are forms of indoors recreation enjoyed by many people. It doesn't mater whether we play a fast game of table-tennis, or go walking through the woods on a brisk autumn day. It is important for everyone to relax from time to time and enjoy some form. of recreation. (33)
A.
It is a story about a dull boy.
B.
Jack worked for a whole day.
C.
Everyone needs recreation to keep fit.
D.
Playing is good, but work is dull.
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β受体阻滞剂
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钙拮抗剂
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硝酸酯类
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利多卡因
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多巴胺
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grant select to dany@localhost on 账户表
B.
grant select on 账户表 to dany@localhost
C.
grant select to 账户表 on dany@localhost
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grant select on dany@localhost to 账户表
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称面σ
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C2
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【单选题】判断下述分子中存在的对称元素
A.
对称面σ
B.
对称中心
C.
C2
D.
不存在对称元素
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A.
GRANT SELECT ON 帐户 TO Lina
B.
GRANT SELECT TO Lina ON 帐户
C.
GRANT SELECT TO帐户 ON Lina
D.
GRANT SELECT ON Lina TO 帐户
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H 2 O 2 分子中只存在极性键
B.
NH 3 的结构式为
C.
HCl的电子式为
D.
H 2 O的比例模型为
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B.
采用塑性域螺栓代替普通螺栓是防止松动的有效途径。
C.
重新紧固塑性域螺栓时规定角度因螺栓或位置的不同而不同。
D.
通过目视检查是否有大的裂纹或变形来决定塑性域螺栓能否再度使用。
【多选题】按风险的损害对象进行分类,风险分为 [填空(1)] 、 [填空(2)] 、 [填空(3)] 和信用风险。
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财产风险
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人身风险
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责任风险
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A.
糖元与纤维素互为同分异构体,与淀粉互为同系物
B.
糖元水解的最终产物是葡萄糖
C.
糖元具有还原性,是还原性糖
D.
糖元不溶于水,无甜味
【单选题】授予用户Jean可以查询帐户表的权限,使用的SQL语句是
A.
GRANT SELECT ON 帐户 TO Jean
B.
GRANT SELECT TO Jean ON 帐户
C.
GRANT SELECT TO帐户 ON Jean
D.
GRANT SELECT ON Jean TO 帐户
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