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【简答题】
阅读短文,选择最佳选项。 Many British people like to go bird-watching in their free time. That's why there are many English sayings about birds. Read the following to learn about them. He eats like a bird. This doesn't mean he eats worms and seeds! A mother might be worried if her son or daughter eats like a bird. It means that the boy or girl eats very little and is very fussy (挑剔) about food. Birds of a feather flock (群集) together. You never see a peacock with a crow (孔雀和乌鸦在一起), or a goose with an eagle. These birds are very different. They like to be with other birds of the same kind. People are like this, too. We always make friends with people who have things in common with us. His chickens have come home to roost (栖息). This means that he has problems now because of bad things he did before. If you play computer games and sleep all afternoon when you should be studying for your exams, you will fail your exam. Then your friends can say that your chickens have come home to roost. 1. How many English sayings have you learned in the text? [     ] A. One. B. Two. C. Three. D. Four. 2. From the text, we know that people with the same idea always . [     ] A. have things in common B. become good friends C. go bird-watching D. keep different ways 3. Which of the following can best explain the saying 'your chickens have come home to roost'? [     ] A. You are so tired after studying that you need a rest. B. You are in trouble because you did bad things before. C. You will fail your exams because they are difficult. D. You should try your best to study hard from now on.
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举一反三
【单选题】当a,b为实数时,下列各式中不一定是二次根式的式子是(  )
A.
b 2 +1
B.
(a-b) 2
C.
0
D.
(a+b) 3
【单选题】下列说法中,正确的是 [     ]
A.
形如 的式子叫分式
B.
分子等于零时.分式的值为零
C.
分母不等于0时.分式有意义
D.
分子等于0时.分式无意义
【简答题】TCP释放连接需要( )次握手。
【单选题】设等比数列{a n }的前n项和为S n ,若8a 2 +a 5 =0,则下列式子中数值不能确定的是 [     ]
A.
B.
C.
【判断题】矽肺是人体长期或大量吸入含游离SiO2粉尘引起的,以肺部弥漫性纤维化为主的一种职业性尘肺病。
A.
正确
B.
错误
【简答题】无菌盘铺后有效期不超过____小时,已启用的的无菌溶液瓶内的溶液小时有效,干置的无菌持物钳应小时更换一次。
【单选题】长期吸入结晶型游离SiO2含量较低的粉尘引起肺组织主要改变为
A.
葱头状矽结节
B.
漩涡状矽结节
C.
矽结节融合团块
D.
弥漫性间质纤维变
E.
以上都不是
【单选题】若一数列的前四项依次是2,0,2,0,则下列式子中,不能作为它的通项公式的是 [     ]
A.
a n =1﹣(﹣1) n
B.
a n =1+(﹣1) n+1
C.
D.
a n =(1﹣cosnπ)+(n﹣1)(n﹣2)
【单选题】长期吸入含量较低的结晶型游离SiO 2 粉尘引起肺组织主要改变为
A.
葱头状矽结节
B.
漩涡状矽结节
C.
矽结节融合团块
D.
弥漫性间质纤维变
E.
以上都不是
【单选题】长期吸入含游离SiO2的粉尘引起的,以肺组织纤维化为主的全身性疾病,称为
A.
石棉肺
B.
尘肺
C.
煤肺
D.
矽肺
E.
混合性尘肺
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