正态分布资料σ未知,95%可信区间的计算公式为()
A.±1.96S
B.±2.58S
C.
D.
E.
参考答案:C
根据所给首字母填空。
The Spring Festival is the Chinese New Year's D 1 . It usually comes in F 2 . Everyone in
China l 3 the Spring Festival. When the Spring Festival comes, Li Lei usually h 4 his parents clean
their h 5 and do some shopping and other housework. On that day everyone in China e 6 jiaozi,
New Year's cakes and some other delicious food. Li Lei likes New Year's cakes, but Lanlan says jiaozi
is nicer than New Year's cakes. The C 7 people eat the New Year's cakes and jiaozi in their
houses. How h 8 they are!
提示重症肝炎最有意义的指标是()。
A.血清胆红素水平升高
B.ALT明显升高
C.凝血酶原时间明显延长
D.血清白蛋白降低
E.γ-谷氨酰转肽酶增高