简述模具中圆柱面定位的适用范围及特点。
参考答案：
圆柱面定位适用于超长套管之类制品，它具有使制品壁厚均匀，模芯不易歪斜的特点。
下列有关鳞状细胞癌的描述，不正确的是（）
A.镜下可见鳞状上皮蟹足状增生
B.癌细胞呈团块状排列，其中心可角化称为角化珠
C.癌组织分化特征是细胞间桥存在和角蛋白产生
D.恶性程度越高，角化珠量越多，细胞间桥越明显
E.可经血道淋巴道转移
The nurse is teaching a client who receives nitrates for the relief of chest pain. Which of the following instructions should the nurse emphasize（）
A. Repeat the dose of sublingual nitroglycerin every 15 minutes for three doses.
B. Store the drug in a cool, well-lit place.
C. Lie down or sit in a chair for 5 to 10 minutes after taking the drug.
D. Restrict alcohol intake to two drinks per day.
