流脑发生皮肤瘀点的病理基础是A．血管脆性增加 B．血小板减少，

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问题单项选择题

流脑发生皮肤瘀点的病理基础是

A．血管脆性增加

B．血小板减少，凝血因子消耗

C．广泛血管内凝血

D．细菌及内毒素引起小血管栓塞性炎症

E．细菌外毒素引起小血管栓塞性炎症

答案

参考答案：D

选择题

如果轴截面为正方形的圆柱的侧面积是4π，那么圆柱的体积等于[ ]

A、π

B、2π

C、4π

D、8π

填空题

根据首字母填单词。

1. Danny wants to go s______on Sunday.

2. Wangfujing isn't f_______. We can walk there.

3. He wants to buy a shirt. He looks in fifteen s______.

4. Squirrels (松鼠) each have a long t_______.

5. — What t_____is it now? — It's 6 o'clock.