《国家基本比例尺地形图分幅和编号》规定，我国基本比例尺地形图

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问题单项选择题

《国家基本比例尺地形图分幅和编号》规定，我国基本比例尺地形图均以（）地形图为基础，按经差和纬差划分图幅（）。

A.1：1000000

B.1：500000

C.1：100000

D.1：10000

答案

参考答案：A

填空题

时态填空。

1. There (be) a parents' meeting next week, isn't there?

2. We look forward to (hear) from you soon.

3. My sister (not stay) at home last Sunday.

4. I asked him (not make) a noise because my mother was sleeping.

5. We were tired after a long walk, so we stopped (have) a rest.

6. You should (say) sorry to her. You made her (cry).

7. Be quick. Someone (wait) for you at the gate.

8. I heard the boy (sing) when I came back.

9. My daughter practises (play) the piano for two hours every day.

单项选择题

下列关于旋毛虫病的流行病学特征，错误的是（）

A.人被感染后产生体液免疫和细胞免疫

B.人类食生或不熟的猪或其他动物肉而感染

C.人群普遍易感，与职业、地域无关

D.对再感染可产生保护性免疫力

E.猪、鼠是重要传染源