男性，35岁，发热伴牙龈渗血10天。体检：体温39℃，贫血貌，胸骨压痛明显，肝、脾肋

用所给词的适当形式填空，每空一词。

1.  Last summer my friends and I went ______ (camp) in the forest. It was exciting.

2.  Her mother went out a moment ago.  She is ______ (babysit) her little sister.

3.  Just now I ______ (hear) him play the violin.

4.  —What are Liu Ying and her classmates doing for vacation?

    —They are going______ (hike) in the mountains.

5.  I am______ (plan) to have a relaxing vacation.

6.  The company (公司)______ (send) some engineers abroad last year.

7.  —What are they doing for vacation?

    —They are______ (relax) at home.

费率是某些费用项目按一定（）计取费用的百分比。

A.参数

B.基数

C.标准

D.要求

发票中的数量、单价和金额可以冠以“大约”(about)或类似的文字。

简述辅助乳化剂有哪些。

双拥工作必须坚持哪些基本原则？