悬浮固体是指将一定量的水样,用一定的过滤器过滤后,残留在过滤器上面的滤渣,在()℃下蒸干后的固体。
参考答案:105-110℃
开放作文。
请根据下面提示,写一篇短文。词数不少于50。
In your spoken English class, your teacher shows you the following picture. You are asked to describe
the picture and explain how you understand it.
__________________________________________________________________________________
_____________________________________________________________________________________
在农业保险中,为利用海水资源进行人工养殖者提供的一种保险是()。
A.畜产养殖保险
B.海水养殖保险
C.人工养殖保险
D.水产养殖保险