— _____ do you have an English party? —

根据英文提示写出动物的名称。

1. It lives in the desert and often carries goods for people. It is a _____.

2. It lives in the ocean and has a hole in the top of its head. It is the largest animal in the world.

    It is a _____

3. Its hometown is in China. It likes eating bamboo. It is a _____.

4. It is a big animal and produces milk. It is a _____.

5. It has a couple of beautiful wings and likes dancing in the flowers. It is a _____.

钢琴的标准音a¹的振动频率是（）。

A.464HZ

B.454HZ

C.434HZ

D.440HZ

生存质量评定已广泛应用于()

A．脊髓损伤 

B．脑卒中 

C．肿瘤 

D．高血压 

E．糖尿病

采用罗紫-哥特里法测定乳乳制品中脂肪含量时，为驱除溶于乙醚中的水分，需加入（），使分层清晰。

环保部1月6日表示，全面加大燃煤锅炉取缔力度，改用（）；提高行业排放标准，加大排查、整治“小散乱污”企业力度；强化对高排放车辆的监管。

A.热煤联产

B.煤电联产

C.热电联产

D.气电联产