(2013·湖南长沙四校二模)—Is the letter from your mother?

—Yes.But she ________the letter herself，because she doesn’t even know one word.

A．needn’t have written　

B．can’t have written

C．might not have written

D．should not have written

5岁患儿。发热、头痛、呕吐3天，抽搐1次，入院。查体：体温39℃，面色苍白，血常规示：白细胞22×10⁹/L，中性粒细胞占0.88。

体检中，最常见的体征是

A．瞳孔不等大，对光反射迟钝

B．深昏迷，呼吸不规则

C．血压升高，皮肤有瘀点、瘀斑

D．单侧肢体肌张力增高

E．颈有抵抗，神经系统检查异常