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问题 单项选择题 A3/A4型题

女孩，4岁，发热、头痛3天，呕吐2次呈喷射状，入院当天晚上开始频繁抽搐，呈全身性，3～4分钟止，抽搐后昏睡，体温39℃，面色灰白，血白细胞22×109/L，中性粒细胞88%。

该患儿疾病的病变部位主要见于（）

A.硬脑膜

B.软脑膜

C.软脑膜及蛛网膜

D.大脑皮质

E.脑室膜

答案

参考答案：C

单项选择题

对肠道局部具有免疫保护作用的是

A．1gA抗体

B．IgD抗体

C．IgE抗体

D．IgG抗体

E．IgM抗体
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单项选择题

As viewed from space, the Earth’’s distinguishing characteristics are its blue waters and white clouds. Enveloped by an ocean of air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our solar system known to harbor life. Circling the Sun at an average distance of 149 million km (93 million miles), the Earth is the third planet from the Sun and the fifth largest planet in the solar system. Its rapid spin and molten nickel-iron core give rise to an extensive magnetic field which, coupled with the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars. Most meteors burn up in the Earth’’s atmosphere before they can strike the surface. The planet’’s active geological processes have left no evidence of the ancient pelting it almost certainly received soon after it was formed. The Earth has a single natural satellite — the Moon.

Which of the following helps to create the Earth’s magnetic fields

A．Its blue waters.

B．Its nitrogen atmosphere.

C．Its molten metal core.

D．The Moon.
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