There _____ lots of apples on the tree.[

Tom : Hi, Cathy. ___1__                                 

Cathy: I have to finish my project on the history of the Internet. What about you?

Tom : 2 If it’s fine, we’ll go camping. Would you like to join us?  Cathy: I’d like to, but the deadline for my project is next Monday.

Tom : What a pity!   3                                     

Cathy: Yes, please. Can you suggest any good reference books?

Tom : You may want to read Origins of the Internet and The Digital Future.

Cathy: I’m reading the two books.    4                        

Tom : Go to the Science Museum website, and you’ll find lots of up-to-date information.

Cathy: Good idea. Thanks for your help.

Tom :    5                                        

A．Never mind.

B．Don’t mention it.

C．Any other suggestions?

D．Will you come next time?E.it depends on the weather          F.Anything I can do for you G.What are you up to this weekeed?

Since there’s no more work to do, we might just ________ go home.

A．so well

B．as well

C．so good

D．as good

简述内部防雷设计的重点及采取何种防护措施。

已知下列两个化学方程式以及热量变化

①2H₂(气)+O₂(气)2H₂O(液) ，放出571.6 kJ热量

②C₂H₈(气)+5O₂(气)3CO₂(气)+4H₂O(液) ，放出2 220 kJ热量。实验测得H₂与C₃H₈的混合气体共5 mol完全燃烧时放热3 847 kJ，则混合气体中H₂与C₃H₈的体积比是（  ）

A．1∶3

B．3∶1

C．1∶4

D．1∶1

高度疑似生物膜存在的迹象包括（）

A.压疮已存在4周以上

B.过去2周内无任何愈合迹象

C.临床上表现出炎症的症状体征

D.抗菌治疗无效

E.脆弱的肉芽组织