25(OH)2D3合成的部位是() A.皮肤 B.骨骼 C.肝脏 D.肾脏 E.肠道

题型:单项选择题

问题:

25(OH)2D3合成的部位是()

A.皮肤

B.骨骼

C.肝脏

D.肾脏

E.肠道

考点:北京住院医师儿内科Ⅰ阶段儿童保健儿童保健题库
题型:单项选择题

认真读中东地图,填上相应的数字号。

海峡:土耳其海峡_______,霍尔木兹海峡_______。

“五海”及海湾:

里海_______,黑海_______,红海_______,波斯湾_______,阿拉伯海_______,地中海_______。

题型:单项选择题

We’ve talked about snails (蜗牛) and their slow move. But much of the time snails don’t move at all. They are in their shells (壳) —sleeping.

Hot sun will dry out a snail’s body. So at the least sign of hot sun, a snail draws its body into his shell. A snail will die in a heavy rain. So when it rains, a snail does the same thing, too. A snail can sleep for as long as it needs to. It spends all the winter months in its shell, asleep.

In the spring the snail wakes up. Its body, about three inches long, comes out from the shell. When hungry, the snail looks for food. Its eyes, at the end of the top feelers (触角), are very weak. But its sense (感觉) of smell is very strong. It helps the snail to find food and the new greens.

A snail’s mouth is no bigger than the point of a pin (大头针). Yet it has 256,000 teeth! The teeth are very small, and you can’t see them. If you put a snail in a hard paper box, it will eat its way out! And if a snail wears out its teeth, it will grow new ones.

小题1: A snail _________.

A.moves more slowly at night

B.has thousands of feet

C.doesn’t move at all  

D.sleeps much of the time小题2: In the sentence “A snail draws its body into its shell”, the word “draw” means _____.

A.to make with a pencil

B.to push

C.to pull

D.to move away小题3: From the story, we know _________.

A.a snail’s shell is very thin

B.a snail can’t see well

C.a snail’s nose is quite short

D.a snail’s body changes in different seasons小题4: A snail goes to sleep when _____.

A.it feels hungry

B.it is put into a paper box

C.spring is coming

D.it rains heavily小题5:Which of the following is wrong?

A.In winter the snail doesn’t eat or move.

B.A snail doesn’t like living under the sun

C.The snail’s teeth can’t be worn out.

D.The snail’s nose helps to find food.

题型:单项选择题
在远距离输电中,如果输送功率和输送距离不变,要减少输送导线上热损耗,目前最有效而又可行的输送方法是(  )

A.采用超导材料做输送导线

B.采用直流电输送

C.提高输送电的频率

D.提高输送电压

题型:单项选择题

手机银行本地服务功能在全国范围内已实现Q币充值和缴纳太平洋保险的续期保费。

题型:单项选择题

学理性解释在卫生法实施中的作用有?()。

A.推动卫生法学发展

B.纠正司法机关的错误

C.指导卫生立法

D.卫生执法的依据

更多题库