大多数法洛四联症发绀出现的时间是（）。 A.生后即出现 B.生后3～6个月 C.生后

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     The first night in Yosemite had been awfid. I hadn't been able to sleep and I was stuck in a too small

tent with my wife and two kids. "Things haven't worked out. "I said to myself. But, like so many other

things I complain before my morning coffee, this one was extremely off-key. Things weren't bad; they

were good.

    A hundred yards away was Summit Lake. It was beautiful. We fired up the camp stove and boiled up

a cup of coffee. Half an hour later, my 6-year-old daughter and I were in the parking lot of the Lassen

Peak Trail, getting ready to hike. We wouldn't make it all the way-young legs get pretty tired on a steep

mountain path-but it didn't matter. We would see great views spread out below us, the volcanic(火山的)

ash that layered on the earth turning the melting snow a mysterious pink as the sun struck it. Later, during

the hike, I felt stupid about my morning complaints. Everything had been worthwhile. It gave me great

satisfaction to see my daughter so excited about the view from the mountain.

    Yes, camping is uncomfortable. But there's also something wonderful about being so close to nature.

Just as importantly, there's something about getting young children out of their increasingly

technology-filled comfort zones and forcing them to experience the non-cyber(没有网络的)world

around them. It's a good thing to reconnect every so often with the Great Outdoors.

1. How did the author first feel about camping in Yosemite?

A. Uncomlbrtable.

B. Shocked.

C. Excited.

D. Wonderful.

2. By saying"this one was extremely off-key"in the first paragraph. the author means that____.

A. he had lost his key    

B. this was meaningless

C. this was quite unusual

D. this was far from the truth

3. Which of the following is true according to the article?

A. The author seldom complains in the early morning. 

B. The author walked all the way to the Lassen Peak Trail. 

C. The view from the mountain impressed the author's daughter. 

D. The author hiked to the top of the mountain to get a better view.

4. With the article, the writer tries to send the message that ___   . 

A. it's great to walk outdoors and get close to nature

B. it's advisable to be well prepared before going camping

C. technology causes much harm to human society

D. we should not break the balance of nature

5. What is the proper title of the passage?

A. The Beautiful Park    

B. The Open Air

C. My Daughter and I    

D. Uncomfortable Camping

降低接收机的静噪门限可以（）

A、降低接收机的灵敏度

B、接收远距离的信号

C、抑制接收远距离的信号

D、降低接收机的信噪比

各式构件起线、割角、拼缝达到合格的条件是（）

A、起线顺直

B、割角准确

C、拼缝严密

D、无胶迹

关于青霉素G的叙述中，错误的是（）

A.化学性质不稳定，水溶液易分解

B.口服完全不能吸收，只能肌注给药

C.脑膜炎时可透人脑脊液

D.由肾小管主动分泌排泄

E.丙磺舒可竞争性抑制青霉素的排泄