结合线的投影如果能积聚为一直线或折线,那么这种结合线就称为()结合线。
A.空间
B.必然
C.直线
D.人为
参考答案:C
看图完成短文,每空词数不限。
Look at the picture! This is my school. There are offices, classrooms, a lab, a library, a dining hall and
a gym in it. The classrooms are in front of the __1__. The offices are __2__ the classrooms. The __3__
is next to the classrooms, too. The dining hall is __4__ the offices. And it is __5__ the gym.
头部外伤后最常扪触到的头皮下波动是()
A.皮下血肿
B.帽状腱膜下血肿
C.骨膜下血肿
D.皮下积液
E.皮下积脓