油船安全指南包括()
A、《油轮安全手册》
B、《国际油船和油码头安全作业指南》
C、《船间(石油)转载指南》
D、《油船海上防污染指南》
E、以上都是
参考答案:E
When people from western countries want to relax themselves, they prefer _____with their families rather than .
A. to watch TV, staying at home
B. to watch TV, go out
C. to drive out, watch TV at home
右图为免疫的有关示意图。依据两图回答下列问题:
图a中甲、乙、丙分别表示()、()、()