心脏望诊正常小儿心尖搏动范围在()
A.1~1.5cm2
B.1~2cm2
C.2~3cm2
D.2~4cm2
E.3~5cm2
参考答案:C
She is often laughed at ________ her classmates because of her laziness.
A.with
B.by
C.to
D.from
提单的空白背书,是指在提单背面不作任何背书。