鹦鹉的足型是()。
A.对趾型足
B.常态足
C.前趾型足
D.异对趾型
参考答案:A
肠梗阻时肠腔内大量气体主要是因为()。
A.肠蠕动增加
B.肠内容物的发酵
C.细菌繁殖
D.血运弥散
E.吞入咽下的气体
—Excuse me, where is the nearest bookshop, please —Sorry, I don't know. —______.
A.You're welcome B.Thank you all the sameC.I'm sorry to hear that D.Thanks a lot