变压器绝缘电阻测定的周期是（）. A.一季度 B.半年 C.一年

下列不属于生物防治的是[ ]

A．苏云金杆菌杀棉铃虫　　

B．白僵菌杀松毛虫

C．用粘蝇纸捕杀苍蝇　　　

D．瓢虫捕杀蚜虫

对《素问·上古天真论》中“肾者主水，受五藏六府之精而藏之，故五藏盛乃能泻”的错误理解是（）

A.肾精源于先天，充于后天

B.肾主藏精，有藏有泻

C.肾精之盛衰，关系全身之盛衰

D.肾司气化

E.五藏精气充盛，肾才能泄精

男性患者，45岁，自觉全身疲乏，下肢沉重无力，肌肉酸痛，伴有四肢末端蚁行感。经调查，该患者长期食用精白米，TPP效应在16%以上，其可能缺乏哪种营养素

A．维生素B₁

B．维生素B₂

C．维生素C

D．蛋白质

E．维生素A

Dina Borzekowski made a study of a group of third-grade students from six American schools. During a school year, nearly 400 students and their parents were asked to report on whether they had such things as televisions and computers in the home, as well as how often the child used them. The children’s language ability was tested (测验) twice over the year. Children who had a television set in the bedroom but did not have a computer at home scored (得分) the lowest, while students without TV in the bedroom but with a computer at home scored the highest. Students who had a television in the bedroom over the school year scored lower than those who had their TV taken away during the same time.
"This study suggests that taking TV sets out of children’s bedrooms, or not putting them there, may be helpful," said Borzekowski. "While this study does not prove (证明) that bedroom TV was the reason for the lower test scores, it suggests that children shouldn’t have TV in their bedrooms. It also suggests that a home computer may help a child’s test scores. The best way was having both: no TV in the bedroom and also a home computer to use. \

Who scored the highest on school tests
[A] Children with bedroom TV and home computers.
[B] Children without bedroom TV or home computers.
[C] Childern without bedroom TV but with home computers.