流体在压强增大时,体积被压缩而(),密度(),这一性质称为流体的压缩性。
A.增大,减小
B.减小,增大
C.减小,减小
参考答案:B
-It shouldn't take long to clear up after the party if we all volunteer to help.
-That's right_________.
A. Many hands make light work
B. Something is better than nothing
C. The more the merrier
D. The sooner begun, the sooner done
我国资源跨区域调配的地理背景是什么?资源跨区域调配对输出地区和输入地区有何意义?(以西气东输为例)