跨装车组应使用车钩缓冲停止器,安装应在车钩()下进行。
参考答案:自然状态
There are citizens who support graffiti, saying it’s a welcome addition to _________ dull street.
A.otherwise
B.rather
C.therefore
D.approximately
试述物种的分布完全由温度决定吗?