【多选题】众数的性质是( ) : (1) 在分组资料中,众数仅受上下相邻两组频数大小的影响。而不受极端值的影响,因而对开口组资料,仍可计算众数。 (2) 受抽样变动影响大。 (3) 对于给定资料,其反映集中趋势的指标,只有众数不唯一确定。有的资料只有一个众数,有的资料没有众数,有的资料则存在好几个众数。 (4) 在频数分布中,众数标示为其“峰”值所对应的变量值,它的优点是帮助我们很容易区分出偏态以及单峰分...
【单选题】Which of the following is an appropriate posture?
A.
Relaxing your shoulders
C.
Rocking back and forth
D.
Turning your back on the audience whilst you speak
【单选题】Which _______ your brother ________, apples or bananas?
【单选题】Which of the following item does NOT belong to the allomorphs of the morpheme {-ed}?
【单选题】She doesn’t tell me .
B.
which room she lived in
C.
which room does she live
【单选题】Which of the following items does NOT belong to the allomorphs of the morpheme '-ed'?
【单选题】Concerning one's sitting posture, which of the following is correct?
A.
One should prop his head with his elbows on the table.
B.
One should hold an extra napkin.
C.
One should be upright in his chair.
D.
One should lean against the back of his chair.
【单选题】--Does Jenny live here? --But I don't know_______.
A.
Which room does she live in
B.
in which room lives she
C.
which room she lives in
D.
in which room does she live