下列物质中毒可采用腹膜透析解救的是
A．阿片类B．有机磷杀虫药C．长效巴比妥D．铅E．亚硝酸盐
参考答案：C
The accident happened on such an evening with strong winds __________ by heavy rain. [ ]
A. appeared
B. happened
C. accompanied
D. mixed
简述胚乳培养的意义。
