早产儿的定义是（） A.胎龄 B.胎龄>37周至 C.体重 D.体重 E.胎龄

根据短文内容及首字母提示补全单词。

     Jack went to a barber's shop and had his hair cut, but when he came out, he was not (1)_h_______

with the result. When his friend Bob saw him, he (2)l_______ and said,   "What happened to your hair,

Jack?"

     Jack said, "I tried a new barber's shop today, because I wasn't quite satisfied with the (3)o_______

one, but this one seems even (4)w_______."

     Bob agreed. "Yes. I think you are right, Jack. Now I'll tell you (5)w_______ to do when you go into

a barber's shop (6)n_______ time.  Look at the barber's hair,   find out  whose  hair (7)l_______ worst,

and then go straight to him."

     "Why shall I go to him?" Jack asked, "But that would be foolish."

     "Oh, no, it wouldn't." said Bob. "Who cut that man's (8)h_______? Just think it over. He couldn't cut

it (9)h_______, could he? One of the (10)o_______ barbers cut it. So you know he can't  be  the worst

barber."

毕Ⅱ式胃大部切除术术后并发症的观察包括（）。

A.胃潴留

B.术后出血

C.术后梗阻

D.倾倒综合征

E.十二指肠残端破裂

为什么氯化前要进行还原熔炼？

对于一个现代物流系统进行评价不仅仅在选择实施方案之前进行评价，而且还要对实施过程中的方案______、对实施完成后的物流系统进行______以及对已经投入运行的物流系统进行______。