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【单选题】
Australian children are visiting social media websites at an increasingly younger age, a new survey suggests, with one in five 'tweens' (children between the ages of about 10 and 14) admitting they have chatted to someone online they do not know. The report Tweens, Teens and Technology' by online security company McAfee found that children in the tweens age【C1】______of 8 to 12 were【C2】______technology faster than expected, with 67 percent using a social media website..【C3】______the age eligibility for Facebook being 13, one in four (26 percent)【C4】______using the site— although 95 percent said they had their parents【C5】______to do so. The most【C6】______site for tweens was Skype (used by 28 percent),【C7】______children were also using Instagram, according to the survey of 500 youngsters geographically【C8】______of Australias online population.【C9】______the survey found that one in five tweens (19 percent) said they chatted to someone online that they did not know,【C10】______seven percent said they had shared personal information. Australias Communications Minister Stephen Conroy said it was【C11】______that children talk to strangers online. 'It shows we must remain【C12】______to online threats,' he said. The findings suggest the age at which children first use social media is【C13】______, given a 2012 McAfee survey of teens aged 13-17 found the average age they opened their first social network【C14】______was 13. On average, tweens were using three or four devices that can be Internet【C15】______, with 66 percent of them【C16】______mobile phones and/or tablets. Fifty-four percent said they used a tablet for more than an hour a day. Most tweens use their devices to【C17】______the Internet, and on average spend about 1.5 hours a day browsing the web, the survey said. 'Both parents and schools are encouraged to keep a close【C18】______on their childs online behavior. to ensure they have safe online【C19】______,' said Andrew Littleproud, president of McAfee Asia-Pacific. 'By working closely with child psychologists, we have seen that online behaviors firmly set in the tween age group so active education is【C20】______within eight to 12 age bracket.' 【C1】
A.
structure
B.
gap
C.
category
D.
limit
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【多选题】在滴定分析法测定中出现的下列情况,哪种导致系统误差
A.
试样未经充分混匀
B.
滴定管的读数读错
C.
砝码未经校正
D.
滴定时有液滴溅出
E.
所用试剂中含有干扰离子
【单选题】女性,60岁,右乳房外象限有一肿块,直径约2.5厘米,质硬,边界不清,能推动,同侧腋窝淋巴结未肿大。应首先考虑为
A.
乳房纤维腺瘤
B.
乳房结核
C.
急性乳房炎郁乳期
D.
乳房囊性增生症
E.
乳癌
【单选题】在滴定分析法测定中出现的下列情况,哪种情况会导致系统误差 ?
A.
试样未经充分混匀
B.
滴定管的读数读错;
C.
滴定时有液滴溅出
D.
砝码未经校正
【单选题】花程式中拉丁文字母缩写 “A” 表示()
A.
雄蕊群
B.
雌蕊群
C.
花冠
D.
花萼
【单选题】综合布线工程中最常用的传输介质是
A.
双绞线
B.
大对数线
C.
数据线
D.
光缆
【单选题】在滴定分析法测定中出现的下列情况,哪种导致系统误差
A.
试样未经充分混匀
B.
滴定时有液滴溅出
C.
滴定管的读数读错
D.
砝码未经校正
【单选题】花程式中拉丁文字母缩写“K”,表示( )
A.
花萼
B.
花被
C.
花冠
D.
雄蕊群
【简答题】女性,60岁。右乳外上方肿物1个月来诊。检查:右乳外上象限有一肿物,约3.5cm质地硬,表面不光滑,活动度小,界限不清,右腋部触及3个孤立的淋巴肿块,质硬。 初步考虑是A.乳癌 B.乳管内乳头状瘤 C.乳房囊性增生病 D.乳腺纤维瘤 E.炎性乳癌 为进一步明确诊断,进行了下列检查,其中哪项不妥A.X线检查 B.超声波检查 C.红外线扫描 D.乳头溢液涂片 E.查甲胎蛋白 如何处理A.乳癌根治,术中...
【单选题】女性,60岁。右乳外上方肿物1个月来诊。检查:右乳外上象限有一肿物,约3.5cm质地硬,表面不光滑,活动度小,界限不清,右腋部触及3个孤立的淋巴肿块,质硬。 初步考虑是
A.
乳癌
B.
乳管内乳头状瘤
C.
乳房囊性增生病
D.
乳腺纤维瘤
E.
炎性乳癌
【单选题】综合布线工程中最常用的传输介质是?
A.
同轴电缆
B.
双绞线
C.
光纤
D.
微波
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