椭圆C与椭圆(x-3)29+(y-2)24=1关于直线x+y=0对称，椭圆C的方

若水稻的某种细胞间隙的溶液浓度为A，细胞质基质浓度为B，细胞液浓度为C，则当它因缺水而萎蔫时，三者间的浓度关系是[ ]

A．A＞B＞C

B．A＞C＞B

C．B＞C＞A

D．B＞A＞C

根据情景选择正确答案。

1. 当你想知道同学是否住在公寓时，应该问：[ ]

A. Are you live in a house?

B. Do you live in a house?

C. Are you live in an apartment?

D. Do you live in an apartment?

2. 如果你想知道朋友家离学校远不远，你会问：[ ]

A. How far is your home?

B. Is your home far from school?

C. Is your home and school far?

D. Are your home and school far from?

3. 如果你想知道Jenny所在的城市叫什么，你会问：[ ]

A. What's the name of your city?

B. Where are you going now?

C. What is the name of your country?

D. When are you going back home?

4. 当他人称赞你“You speak good English.”时，你会说：[ ]

A. No, I'm not very good.

B. Thank you.

C. Yes, I do.

D.You're welcome.

一个校园网与城域网互联，它应该选用的互联设备为

A．交换机

B．网桥

C．路由器

D．网关

ATM局域网仿真系统中，连接在ATM网络中的主机与网桥可以从逻辑上划分为若干个独立的区域，每个区域称为一个 【14】 。

城市景观生态元可分为（）。

A、自然景观生态元

B、社会经济景观生态元

C、土壤景观生态元

D、大气景观生态元