试述腹膜的功能
参考答案:
腹膜的功能:具有分泌、吸收、支持和固定脏器、修复及防御的功能。
单词拼写。
根据下列句子所给汉语意思,写出空缺处各单词的正确形式。
1. The plane crashed, killing all 200 people a________.
2. The government has promised to take _______(措施) to help the unemployed.
3. The _______ (大约的) number of children in the school is 3000.
4. Which companies was she _______(提到) to when she spoke of competing firms?
5. It was very _______(考虑周到的)of you to let us know you were going to be late.
赫罗图是以什么为横纵坐标画出来的()?
A、光谱型和距离
B、光谱型和光度
C、光谱型和质量
D、光谱型和元素种类