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听音频:回答题 Last year, researchers published new findings from the Women's Health Initiative, a long-term study of more than 160000midlife women. The data showed that multivitamin-takers are no(26)than those who don't take the pills, at least when it comes to the big diseases——cancer, heart disease, and(27) 'Even women with poor diets weren't helped by taking amultivitamin,' says the study author Marian Neuhouser, PhD, in the cancer(28)program at the Fred Hutchinson CancerResearch Center, in Seattle. Vitamin(29)came into fashion in the early 1900s, when it was difficult or impossible for most people to get a wide variety of fresh fruits and vegetables. Back then, vitamin-deficiency diseases weren't unheard-of: the bowed legs and(30)ribs caused by a severe shortage of vitamin D, or the skin problems and mental confusion caused by a lack of vitamin B, But these days, you're(31)unlikely to be seriously deficient if you eat an average diet, if only because many packaged foods are vitamin-enriched. Sure, most of us could do with a couple more daily(32)of produce, but a multivitamin doesn't do a good job at(33)those. 'Multivitamins have maybe two dozen(34)but plans,s have hundreds of other useful compounds,'Neuhouser says. 'If you just take a multivitamin, you're missing lots of compounds that may be providing benefits. ' There is onegroup that probably ought to keep taking a multivitamin: women of reproductive age. The supplement is insurance(35)pregnancy. 第(26)题__________ 查看材料
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【判断题】FANUC 数控系统中,封闭车削复合循环指令 G73 的参数 U( △ d) 是每次切削深度的半径值。
A.
正确
B.
错误
【单选题】物联网网络控制层内的终端接入网络首选为
A.
有线通信方式
B.
无线通信方式
C.
光纤通信
D.
计算机通信
【判断题】水平位移监测的主要精度评定指标有:相邻基准点的点位相对中误差、测角相对中误差、测边相对中误差。
A.
正确
B.
错误
【单选题】水平位移监测的主要精度评定指标有: ( ) 、测角中误差、测边相对中误差。 (A) 相邻基准点的点位中误差 (B) 极限误差 (C) 高差中误差 (D) 高程中误差
A.
B.
C.
D.
D
【判断题】力偶可以和一个力等效。____ 改错:
A.
正确
B.
错误
【判断题】FANUC 系统中,车削复合循环指令 G73 主要用于加工毛坯余量均匀的铸造、锻造成形工件。
A.
正确
B.
错误
【单选题】物联网控制层内的终端接入网络首选为 ( ) 。
A.
有线通信方式
B.
无线通信方式
C.
光纤通信
D.
计算机通信
【单选题】FANUC数控车系统中G76是()指令(FANUC系统)。
A.
螺纹切削复合循环
B.
端面切削循环
C.
深孔黏削循环
D.
封闭切削复合循环
【多选题】平面汇交力系可以用一个 来等效,平面力偶系可以用一个 来等效,平面平行力系可以用一个 和一个 来等效。
A.
B.
力偶
C.
D.
力偶
【单选题】水平位移监测的主要精度评定指标有:相邻基准点的点位中误差、测角中误差、 ( ) 。 (A) 测边中误差 (B) 测边相对中误差 (C) 测边绝对中误差 (D) 测角相对中误差
A.
B.
C.
D.
D
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