高层民用建筑的电子游艺厅、网吧应遵守的设计规定为( )。 A．设在地下一层的一个厅室

阅读理解。

(A)请将对话中所缺的句子补充完整。

A: Hello! This is Tom speaking. Can I speak to Mary?

B: 1________________, Tom. How are you?

A: 2________________. Let's go to the library this afternoon, OK?

B: That's good. But, how can we get there?

A: That's easy. First come to my home by bike. Then we take the No.6 bus to the library.

    There is a book show in the library. We can buy some cartoon books.

B: Great! I'll get your home at 2 o'clock.

A: See you then.

B: 3________________

(B)根据对话内容回答问题。

4. Where do they want to go?

________________________________________________

5. How do they go there?

________________________________________________

下列关于DNA复制过程的正确顺序是

①互补碱基对之间氢键断裂 ②互补碱基对之间形成氢键 ③DNA分子在解旋酶的作用下解旋 ④以解旋后的母链为模板进行碱基互补配对 ⑤子链与母链盘绕成双螺旋结构[ ]

A．①③④②⑤

B．①④②⑤③

C．①③⑤④②

D．③①④②⑤

体育课上有爬绳和爬竽两种运动,某同学先后以相同的姿势顺着绳子和竽匀速向上爬,设爬绳时受到的摩擦力大小为F₁,爬竽时受到的摩擦力大小为F₂,则F₁_____F₂(填">"或"="或"<")

病毒性脑脊液中葡萄糖含量多( )

A．减低
B．增高
C．正常
D．明显增高
E．明显减低

患者，女，58岁，颊侧牙龈黏膜黑色斑发现2年，大小约1.3cm×0.8cm，近期生长迅速，色素加深，周围有卫星，可能的诊断为

A．黏膜黑斑

B．恶性黑色素瘤

C．牙龈血管瘤

D．色素痣

E．异位皮脂腺