物流标准化系统的主要特点包括（）。 A.物流标准化系统属于一次系统，或称后标准化系统

阅读短文，判断对(√)错(×)。

      Hi, friends. Welcome to my home. This is a photo of my family. It's on the wall. Look! This is my grandma

and this is my grandpa. They look young (年轻的). They are farmers. My father is a doctor. He's strong. He

likes sports. My mother is a nurse. She likes flowers. She's quiet. Oh, this is my sister. She's 15 years old.

Who's this boy? Guess! Yes, it's me. I like music and reading.

( ) 1. I am a boy.

( ) 2. There are five members in my family.

( ) 3. My grandpa is a farmer. He looks old (年长的).

( ) 4. My mother and my father are farmers.

( ) 5. I like reading and listening to the music.

女，60岁，癫痫发作3周，近1周头痛、恶心、呕吐，一过性右侧肢体无力，无发热，二便正常。6年前右乳腺癌切除术。CT显示左额大片低密度，有明显占位效应。根据所提供病历进行鉴别诊断，首先考虑哪种疾病( )

A．脑转移瘤
B．脑胶质瘤
C．脑梗死
D．脑膜瘤
E．脑炎

（）爆发的五四运动是近代中国第一次彻底的反帝反封建的革命运动、标志着新民主主义革命的开端、为中 * * 党的成立作了思想上和干部上的准备、开创了“科学、民主、进步、爱国”的“五四精神”。

A、1921年

B、1920年

C、1919年

简述焊缝按照结合形式的分类。