矿用660V低压馈电开关采用电子式和电磁式主保护时，其保护的灵敏度不得低于1.5倍。

The first visit to a foreign country that I can remember was when I was about seven years old. We live about 5 miles away from the Canadian border(边界). My family and I went to Parc Safari, Quebec, a wonderful place that has animals and rides. We drove down a nice long road. My sister and I sat in the back of the car, and it was a hatchback(有仓门式后背的汽车) so we opened it up. I remember feeding the animals snacks we had bought for ourselves.

The time we went we were told there would not be monkeys because they had escaped and had not been found. I remember thinking to myself, how cool it would be to see a monkey in our backyard.

Even though the monkeys were not there it was still so much fun. When we reached the area that had camels, giraffes and other animals, I remember one of the camels reached into the car to get our snacks. However, we were a little gross out because the camels seemed to froth(吐白沫) at the mouth and we had camel slobber(口水) all over the car and us.

It was one of the best family vacations that I can remember. It was not too far from home, it was in a different country and it was with my family. I cannot remember if we went on the rides or not but seeing many animals was a great time. Now I am grown up and have a son, and I am planning to go there again. He is 7 years old and I think he is at a great age to enjoy a trip like this. I am sure it has changed a lot over the years but it will still be a great family trip.

小题1:Where did the author live when he was 7 years old?

A．In Canada

B．Near the Canadian border

C．In the central US

D．In Parc Safari小题2: We fed the animals something _____.

A．offered by people living there

B．we bought for them

C．we prepared for ourselves

D．cooked by my sister小题3:what does the underlined part “gross out” in paragraph 3 probably mean?

A．surprised

B．excited

C．tired

D．uncomfortable小题4: What does the author intend to do?

A．To revisit the place he went to at seven.

B．To take his 7-year-old son to a zoo.

C．To have a family trip in his own country.

D．To have a holiday abroad with his parents.

从一个或多个表中将一组记录添加到一个或多个表的尾部，应该使用 ______。

A．生成表查询

B．删除查询

C．更新查询

D．追加查询

苍术的鉴别特征是（）

A.红小辫

B.沙皮

C.乌鸦头

D.朱砂点

E.枫勾

“衔山抱水建来精，多少工夫筑始成。天上人间诸景备，芳园应赐大观名。”这是《红楼梦》中“大观园”名称来历的篇联，是谁所撰？请简要说明“大观园”来历。

地球的外部圈层包括（）、（）和（）。