小儿的主动免疫力随年龄增长而逐渐增强，免疫球蛋白IgG一般到6～7岁达到成人水平。
A. 正确
B. 错误
患者，女性，62岁。早期肝癌，拟行肝叶切除术。术后病情平稳，可为患者采取（）。
A. 侧卧位，避免过早活动
B. 俯卧位，尽早活动
C. 半卧位，尽早活动
D. 半卧位，避免过早活动
E. 头高足低位
Which of the following is/are TRUE regarding lashing requirements to secure vehicles aboard Ro-Ro vessels? （）
A. The securing of cargo on flats and trailers and in containers must be adequate to withstand both road and sea motions
B. The generally recommended lash angle cannot be greater than 45 degrees relative to the deck inany direction
C. It is necessary for an adequate number of securing points on the vehicles themselves in order that lashings may be properly and safely utilized
D. All the above
列车长度应根据运行区段内各站调车线的有效长，并须预留50米的附加制动距离确定。
A. 正确
B. 错误
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