包装储运图示标志的作用是用（）来指示物资在运输装卸及保管作业中要注意的事项，用以保证物资的安全。
参考答案：图形及符号
下列各句中均有一处错误，请指出并改正。
1. I prefer reading to write. ______________
2. This piece of music doesn't interest in the boy at all. ______________
3. We need an eight-hours sleep a night. ______________
4. Song Zuying is one of the best-known Chinese singer. ______________
5. I prefer singers who sings different kinds of songs. ______________
6. Do you remember the days when we spent in Beijing? ______________
患者女性，32岁，农民，初产妇。孕33周时做产科检查发现子宫后倾，臀位，医生建议矫正胎位，定期做产科检查。
若该女性自然分娩，可采用
A．去枕仰卧位 B．头高足低位C．头低足高位 D．膝胸位E．截石位
