早期妊娠只能用哪种检查诊断()
A.脑血管造影
B.CT
C.摄片
D.透视
E.超声
参考答案:E
--Our monitor, John is very bright and studies hard as well.
-- No _____ he always gets the first place in any examination.
A.word
B.question
C.problem
D.wonder
为什么说马致远是元前期散曲的大家?