慢性肾炎的必有表现是
A.镜下血尿B.下肢水肿C.高血压D.蛋白尿E.尿路感染
参考答案:D
Which statement best describes the properties of Student’s t-distribution()
A. The t-distribution is symmetrical, defined by two parameters and is less peaked than the normal distribution.
B. The t-distribution is symmetrical, defined by a single parameter and is less peaked than the normal distribution.
C. The t-distribution is skewed, defined by a single parameter and is more peaked than the normal distribution.
每年的6月26日是联合国确定的国际禁毒日。据南方一戒毒所统计,在吸毒人员中,17——35岁的青少年占了90%以上。如此高的比例,不能不引人深思。青少年是国家的未来,祖国的希望,拒绝毒品已写进了《新中学生守则》。读了以上内容,你有何感想?请以“珍爱生命,远离毒品”为题,写一篇宣传稿或做一幅宣传画,以自己的实际行动,让毒品远离校园,远离亲人。