试题与答案

以下各换热器的传热系数以()最大。A.有相变,沸腾-冷凝器 B.有相变,气-液冷凝

题型:单项选择题

题目:

以下各换热器的传热系数以()最大。

A.有相变,沸腾-冷凝器

B.有相变,气-液冷凝

C.气-气换热型

D.蓄冷器

答案:

参考答案:A

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题型:阅读理解

阅读理解。

Welcome to My Birthday Party

Helen: Hi, everyone. Welcome to my birthday party.

Tom: Happy birthday!

Peter: Enjoy yourself today, Helen.

Helen: Thanks a lot. It’s my pleasure for you to join in my party.

Tom: Here’s a present for you. Do you like it?

Helen: Of course, you’re very kind.

Peter: Here you are, Helen.

Helen: Oh! How beautiful the birthday card is! Thank you very much. Now, come into the dining room,

please. I’m going to cut the cake.

阅读上面的情景,完成下列填空。

1. Helen having a_______ .

2. and are at Helen’s party_______.

3. Peter gives a to Helen_______.

4. The party is having at_______ .

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