题目内容

圆柱被一平面截切后产生的截交线形状有、、三种。

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圆锥被一平面截切后产生的截交线形状有、、、四种。

Task 3 Match the underlined parts of the sentences with their definitions.♦This includes the 1. schedule of the planned events, …♦ You will also find 2. enclosed copies of the electronic business cards of allthe 3. attendees .♦ If you need a 4. pick-up service, please look for members of our staff…♦ … please 5. check in at the Reception Desk.♦ … and will 6. generate a lot of new business…Definitionsa. people who are present at a meeting, gathering, ceremony, etc.b. a plan for performing work or achieving an objective, specifying the order andtime for each partc.the work that includes receiving visitors or guests at the airport or station andthen arrange transportation to bring them to the hoteld. to bring into being or give rise to somethinge. to be inserted into the same envelope or package, or attached to a letter or e-mailf. to register as a guest at a hotel, as a passenger at an airport or as an attendee ata meeting

Task 2 Complete the passage that summarizes the textTo hold successful business meetings, a few things should be taken care of. Before a meeting, 1.can ensure the better results. And the organizer can show the participants the list of topics to be covered by 2. _______. During a meeting, usually two things may largely affect the meeting process. Firstly, the participants won’t feel the meeting is a waste of time if they have good 3. _. Secondly, everyone should 4. _ by sticking to the point. After a meeting, the 5. ___should be circulated to all the participants for affirmation.

药物的过筛效率与哪些因素有关

A. 药粉的粒径范围
B. 药粉的水分含量
C. 过筛时间
D. 密度
E. 震动强度和频率