visio软件是哪个公司出的()
A.惠普
B.微软
C.苹果
D.谷歌
参考答案:B
Frank put the mediocre in the top drawer to make sure it would not be_______ to the kids.
A.accessible
B.relative
C.acceptable
D.sensitive
污染来源:()
A.机动车尾气
B.工厂废气
C.农药过量使用