关于虹膜，说法正确的是（） A.前表面均覆盖有扁平细胞 B.瞳孔括约肌离断后仍保留有

在下面对话的空格内填上一个适当的词，使对话意思完整，语句正确。

A: Mum, I shall not have lunch at home today.

B: Why not, Linda?

A: I want to go to the pet (宠物) shops at noon with my classmates. Most of the students in our class have their

    own pets. Mum, as you know, I 1.            got a pet yet.

B: What 2.             of pet do you want to have?

A: A dog 3.             a cat. I haven't decided yet.

B: You'd better not keep a dog in our flat. It would make much noise. And a dog has to go out every day, and

    there isn't a 4.             near our building. And the dog food is expensive.

A: Then I'll have a cat. Cats are cheaper than dogs, and they are quiet, too.

B: Yes, cats are easier to 5.            . 

租赁关系会因双方中的一方死亡而自动终止的是（）。

A.意愿租赁

B.定期租赁

C.私房租赁

D.自动延续租赁

围绝经期功血调整月经周期适用（）

A．雌激素、孕激素序贯疗法 

B．雌激素、孕激素合并疗法 

C．绒毛膜促性腺激素促排卵 

D．孕激素疗法 

E．雄激素疗法

《特种设备安全监察条例》规定，最高工作压力大于或等于0.1Mpa，容积大于或等于25L，且最高工作压力与容积的乘积不小于（）的容器为压力容器。

A.10.0Mpa·L

B.2.5Mpa·L

C.5.0Mpa·L

D.0.5Mpa·L

以下哪个不是基于技术的客户流失（）

A.终端客户流失

B.功能性客户流失

C.网络客户流失

D.渠道客户流失