How many ____________ are there on the d

I used to travel by air a great deal when I was a boy. My parents used to live in South America and I used to fly there from Europe in the holidays. An airhostess would take charge of me and I never had an unpleasant experience. I am used to traveling by air and only on one occasion have I ever felt frightened. After taking off, we were flying low over the city and slowly gaining height, when the plane suddenly turned round and flew back to the airport. While we were waiting to land, an airhostess told us to keep calm and to get off the plane quietly as soon as it had touched down. Everybody on board was worried and we were curious to find out what had happened. Later we learned that there was a very important person on board. The police had been told that a bomb had been planted on the plane. After we had landed, the plane was searched thoroughly(被彻底搜查). Fortunately, nothing was found and five hours later we were able to take off again.

根据短文内容判断正（T）误（F）

(      ) 1. The writer used to fly much when he was a boy.

(      ) 2. The writer’s parents used to live in South Africa.

(      ) 3. While they were waiting to land, an airhostess told them to be calm.

(      ) 4. Nine hours later they could take off again.

(      ) 5. There was really a bomb on the plane.

某人从汽车租赁公司租借一辆高级轿车。已知该车的价格为58万元，总租期为2年，每年年末支付租金，折现率为10%，附加率为3%，则每年租金为（）万元。

A．22.17

B．26.54

C．36.54

D．13.18

我国安全生产方针是什么？

十个月患儿，轻咳伴发热半天，呕吐6次，不久水样便，开始为黄色后转为白色水样、量多黏液少，无腥臭，尿极少，于10月份就诊。体温39.5℃，面色苍白，皮肤弹性差，前囟及眼窝凹陷，哭泪少，咽充血，心肺正常，腹稍胀，肠鸣音活跃。

最可能诊断是()

A．轮状病毒肠炎

B．诺沃克病毒肠炎

C．致病性大肠杆菌

D．侵袭性大肠杆菌肠炎

E．产毒性大肠杆菌

J-K触发器使用了（）个LFSR。

A、1

B、2

C、3

D、4