DNA有几种碱基（）。 A.4种 B.3种 C.6种 D.5种 E.2种

虚拟存储管理系统的基础是程序的______原理，其基本含义是指程序执行时往往会不均匀地访问主存储器单元。根据这个原理，Denning提出了工作集理论。工作集是进程运行时被频繁地访问的页面集合。在进程运行时，如果它的工作集页面都在______内，能够使该进程有效地运行，否则会出现频繁的页面调入/调出现象。

A．全局性
B．局部性
C．时间全局性
D．空间全局性

If a snake bites you, take a photo with your mobile phone! It save your life. This is the surprising advice of a British cook. One day Henry Jackson was working in a restaurant kitchen. He picked up a dish from a table, and suddenly a snake appeared and bit him on the hand. A few days earlier, the snake came to the restaurant from Asia in a box of bananas. It climbed out of the box and hid under the dish. “ I tried to pick it up and it bit me. I threw it away, but it landed in the fridge. So I closed the door.” Jackson said. Anyway, Jackson was cool and he took a photo of the snake with his mobile phone. Soon his hand began to ache and he went to hospital. Then his chest began to hurt. Doctors couldn't say what was wrong because they didn't know what kind of snake it was.

Then Jackson remembered his mobile phone photo. The doctors sent it to London Zoo. When they knew the kind of snake, they could give Jackson the right medicine, and he left hospital the next day. “ So my advice is this: If a snake bits you, pick up your phone. Take its photo first and then call the hospital. Show the photo to the doctors,” suggests Mr. Jackson. “ Oh, and if the snake doesn't smile for its photo, don't worry!”

小题1: When the snake bit Mr. Jackson, it was        .

A．hiding in a box of bananas

B．climbing out of a box of bananas

C．lying under a dish

D．climbing into the fridge小题2:Mr. Jackson threw the snake away probably because        .

A．he was surprised

B．he wanted to get a better photo

C．his chest began to hurt

D．the fridge door was open小题3:Mr. Jackson closed the fridge door so that        .

A．he could take a photo

B．the snake couldn't go back to the zoo

C．the snake became cool

D．he was safe from the snake小题4:The doctors gave Mr. Jackson the right medicine when        .

A．London Zoo told them what kind of snake it was

B．Mr. Jackson sent the photo to the hospital

C．he left hospital the next day

D．the snake bit him小题5:The text tells us if we are in danger and have a phone with us, it will help us to do       thing.

A．one

B．two

C．three

D．four

导致阴损及阳的主要机理是（）

A.阴虚不足，虚阳上亢

B.外感阴寒之邪，伤及阳气

C.阴液亏损，虚热内生

D.阴寒壅盛，阳气浮越于外

E.阴液亏损，累及阳气生化不足

容积为0.67mL的硬胶囊是（）

A.00号

B.0号

C.1号

D.2号

E.3号

一道多项选择题有A、B、C、D、E五个备选项，要求从中选出2个或2个以上的选项作为唯一正确的选项。如果全凭猜测，猜对这道题的概率是（）

A．A

B．B

C．C

D．D