吹扫干净的标准是：吹扫要保证较大的汽量，保证时间，放空口没有（）排出。
A、杂物
B、凝结水
C、蒸汽
D、油
参考答案：B
用所给单词的适当形式，完成句子。
1. My shoes are worn out. I will have them _____ (mend) this afternoon.
2. When I got to the cinema, the tickets _____ (sell)out.
3. How many books _____ you _____ (read) during the past two weeks?
4. _____ (chemical) is my favorite subject at school.
5. He explained the question again to make himself _____ (understand).
急腹症危重患者观察腹腔少量游离气体最适宜的摄片体位是
A．立位B．仰卧位C．俯卧位D．左侧卧位水平投照E．右侧卧位水平投照
