What does the phrase “the wake-up call” in Paragraph 3 most probably mean?
A. a new disease B. a clear warning
C. a dangerous animal D. a morning call
第1题:
A. is
B. does
C. Do
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:
继续上题,要统计本公司全部门的各个季度的销售额的平均值,可以使用的命令有()
A.tapply(x[,3:6],mean)
B.sapply(x[,3:6],mean)
C.apply(x[,3:6],2,mean)
D.lapply(x[,3:6],mean)
E.apply(x[3:6],2,mean)
第4题:
A.NEW_FORM
B.OPEN_FORM
C.CALL_FORM
D.CLOSE_FORM
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:
类中实现实例作为函数调用的魔术方法是:()
A.__return__
B.__call__
C.__init__
D.__new__