What does the phrase “clam up” in Paragraph 2 probably mean?
A. become excited B. show respect
C. refuse to talkD. seek help
第1题:
A.0.925
B.-0.913
C.0.957
D.0.913
第2题:
X线平均波长(λmean)与最短波长(λmin)的关系是
A.λmean=3λmin
B.λmean=2.5λmin
C.λmean=2λmin
D.λmean=1.5λmin
E.λmean=λmin
第3题:
投点试验计算Ln2,编写成R模拟程序如下 MC.ln2 <- function(n){ x = runif(n,1,2) y = runif(n,0,1) sum(y < 1/x ) / n } MC.ln2(10000) 这是一次模拟,如果进行1000次模拟再平均,R语句如何实现?
A.ys = replicate(1, MC.ln2(1000)) mean(ys)
B.ys = replicate(100, MC.ln2(1000)) mean(ys)
C.ys = replicate(1000, MC.ln2) mean(ys)
D.ys = replicate(1000, MC.ln2(1000)) mean(ys)
第4题:
A. is
B. does
C. Do
第5题:
4.—_________ Mike________ his homework in the evening?
—No,he doesn't.
A. Do;does
B. Does;do
C. Do;do
D. Does;does
第6题:
Miller金字塔模型描述临床技能评价方法,从底到顶的四个层次分别为()
A.DOES- KNOW HOW- KNOW-SHOW
B.KNOW-KNOW HOW- SHOW- DOES
C.KNOW-KNOW HOW- DOES- SHOW
D.DOES- KNOW- KNOW HOW- SHOW