上消化道大出血最常见的原因是
A．胃癌B．出血性胃炎C．门脉高压症D．胃十二指肠溃疡
参考答案：D
The young man broke his arm in the accident and had to ______his job.
A．send up
B．put up
C．get up
D．give up
隔代家庭的咨询要点有哪些？
