The temperature of a gas ______ .
A. changes with the width of a hole
B. sometimes depends on how close together its molecules are
C. has something to do with the molecules that makes it up
D. is always connected with the speed at which its molecules go
查看答案
Some fishermen try to make up______their absence by giving their children expensive presents.
A. with
B. on
C. for
D. of
Small holes are useful in refrigeration because they ______ .
A. can change gases into liquids
B. can turn oxygen into a liquid
C. can allow molecules to go quicker
D. can make molecules further apart
某一级堤防护坡工程中，土工膜的单价及各阶段的工程量如表所示，则发包人应支付给承包人的价款应为()元。
A. 900
B. 780
C. 960
D. 840
动物产生尿素的主要器官是肾脏。()
A. 正确
B. 错误
微信支付 
支付宝支付