皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
近日,有人称甲状腺癌在癌症中的发病率大幅升高,主要原因是长期食用加碘盐。而据专家介绍,世界卫生组织推荐成人每日碘摄入量为150—300微克,欧盟和美国的医学研究机构认为成人碘摄入可耐受上限每日600微克和1100微克。我国碘盐平均含碘量为30毫克/千克。按每人每日摄人盐5—10克计算,每日摄碘量约为150-300微克。扣除烹调和人体代谢的损失,碘摄人量不会高于世界卫生组织推荐量。 这段文字意在说明的是:
A.
食用碘盐易诱发甲状腺癌无根据
B.
过量食用碘盐不利于身体健康
C.
甲状腺癌发病与多种因素相关
D.
我国居民碘摄入量符合安全标准
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】从不同种出行方式对二氧化碳排放量,我们很清晰看到大力发展什么是控制汽车增速的一个主要措施?
A.
新能源汽车
B.
公共交通
C.
高铁
D.
共享单车
【单选题】When the author is talking about the Jewish Population Survey, he seems ______.
A.
to believe the shrinking of the Jews in America
B.
to support the rejection of full integration into society
C.
to blame United Jewish Communities
D.
to be willing to tolerate the fault of United Jewish Communities
【单选题】The author's primary concern in this passage is to ________.
A.
defend people who are addicted to work
B.
encourage us not to worry about our imperfections
C.
accuse famous men of being poor friends
D.
consider the difficulties that we will meet at middle-age
【单选题】微波传感器测量物体含水量主要利用下述微波的哪一个特点( ) prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
微波波长很短,频率很高
B.
水对微波的反射作用很强 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
C.
微波的传输特性很好
D.
水对微波的吸收作用很强
【单选题】The last paragraph suggests that the author believes that ________.
A.
it is definitely more sensible to ask the question about working to live and living to work than it is to play the "live-to-eat or eat-to-live" theme
B.
only work can provide pride and fulfillment
C.
leisure can provide pride and fulfillment
【单选题】The author thinks that the theatre superstitions ___________.
A.
B.
C.
D.
D
【单选题】关节活动度检查时如查出主动运动关节活动度与被动运动不一致时,应
A.
分别测量关节主动活动度和被动活动度,常以被动运动幅度为准
B.
分别测量关节主动活动度和被动活动度,常以主动运动幅度为准
C.
只需测量关节主动活动度
D.
只需测量关节被动活动度
E.
以上都不正确
【简答题】已知{a n }为递增的等比数列,且{a 1 ,a 3 ,a 5 } {-10,-6,-2,0,1,3,4,16}. (1)求数列{a n }的通项公式; (2)是否存在等差数列{b n },使得a 1 b n +a 2 b n -1 +a 3 b n -2 +…+a n b 1 =2 n+1 -n-2对一切n∈N * 都成立?若存在,求出b n ;若不存在,说明理由.
【简答题】设数列{a n }满足 a 1 =0,4 a n+1 =4 a n +2 4 a n +1 +1 ,令 b n = 4 a n +1 . (1)试判断数列{b n }是否为等差数列?并求数列{b n }的通项公式; (2)令 T n = b 1 × b 3 × b 5 ×…× b (2n-1) b 2 × b 4 × b 6 ×… b 2n ,是否存在实数a,使得不等式 T n b n +1 < ...
【单选题】The bus driver told the author that _________ .
A.
a. her bus had four lights
B.
b. her route was a long one
C.
c. she couldn't help
D.
d. she would help as far as four traffic lights
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题