食管、胃底静脉出血()
A.出血速度快,呕血或便血
B.出血速度较慢,便血为主
C.出血伴腹痛,高热
D.少量便鲜血
E.腹痛、发热、黄疸
参考答案:A
下列实验操作中,正确的是 [ ]
A.
B.
C.
D.
—Can I help you,dear?
—Yeah,l don’t know a banana milk shake. Maybe you can teach me.
A.what to do
B.when to make
C.how to make
D.why to do