题目内容
【题目】病毒疫苗和抗血清(含特异性抗体的血清)在现代免疫学预防、治疗中有重要作用。下列分析中正确的是
A.消灭人体内病毒只需B淋巴细胞和T淋巴细胞参与
B.一种浆细胞可能产生多种抗体
C.人体接种病毒疫苗获得相应免疫力属于非特异性免疫
D.以患病后经治愈的人的血清来治愈患同种病毒感染的重症患者不属于二次免疫
【答案】D
【解析】A、消灭人体内病毒需要体液免疫和细胞免疫共同参与,需要吞噬细胞、B淋巴细胞、T淋巴细胞、效应B细胞、效应T细胞等,故A错误;B、一个效应B淋巴细胞只能产生一种特异性抗体,故B错误;C、人体接种病毒疫苗,使得机体产生抗体和记忆细胞,获得相应免疫力属于特异性免疫,故C错误;D、血清中含有抗体,以抗血清治疗病毒性重症患者说明该患者无相应抗体,不属于二次免疫,故D正确。
【题目】Passage 1
体裁 | 话题 | 词数 | 难度 | 建议时间 |
记叙文 | 救助猫头鹰 | 296 | ★★★☆☆ | 4分钟 |
(2017·新课标全国卷I)I work with Volunteers for Wildlife, a rescue and education organization at Bailey Arboretum in Locust Valley. Trying to help injured, displaced or sick creatures can be heartbreaking; survival is never certain. However, when it works, it is simply beautiful.
I got a rescue call from a woman in Muttontown. She had found a young owl(猫头鹰) on the ground. When I arrived, I saw a 2-to 3-week-old owl. It had already been placed in a carrier for safety.
I examined the chick(雏鸟) and it seemed fine. If I could locate the nest, I might have been able to put it back, but no luck. My next work was to construct a nest and anchor it in a tree.
The homeowner was very helpful. A wire basket was found. I put some pine branches into the basket to make this nest safe and comfortable. I placed the chick in the nest, and it quickly calmed down.
Now all that was needed were the parents, but they were absent. I gave the homeowner a recording of the hunger screams of owl chicks. These advertise the presence of chicks to adults; they might also encourage our chick to start calling as well. I gave the owner as much information as possible and headed home to see what news the night might bring.
A nervous night to be sure, but sometimes the spirits of nature smile on us all! The homeowner called to say that the parents had responded to the recordings. I drove over and saw the chick in the nest looking healthy and active. And it was accompanied in the nest by the greatest sight of all — LUNCH! The parents had done their duty and would probably continue to do so.
【1】What is unavoidable in the author’s rescue work according to paragraph 1?
A. Efforts made in vain.
B. Getting injured in his work.
C. Feeling uncertain about his future.
D. Creatures forced out of their homes.
【2】Why was the author called to Muttontown?
A. To rescue a woman.
B. To take care of a woman.
C. To look at a baby owl.
D. To cure a young owl.
【3】 What made the chick calm down?
A. A new nest. B. Some food.
C. A recording. D. Its parents.
【4】How would the author feel about the outcome of the event?
A. It’s unexpected. B. It’s beautiful.
C. It’s humorous. D. It’s discouraging.