脚本：
require 'rubygems'
require 'watir'
ie = Watir::Browser.new
ie.goto(http://www.baidu.com)
返回错误：
d:/Ruby22/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- dl/import (LoadError)
from d:/Ruby22/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from d:/Ruby22/lib/ruby/gems/2.2.0/gems/watir-classic-4.2.0/lib/watir-classic/win32.rb:1:in `<top (required)>'
from d:/Ruby22/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from d:/Ruby22/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from d:/Ruby22/lib/ruby/gems/2.2.0/gems/watir-classic-4.2.0/lib/watir-classic.rb:32:in `<top (required)>'
from d:/Ruby22/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from d:/Ruby22/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from d:/Ruby22/lib/ruby/gems/2.2.0/gems/watir-5.0.0-x86-mingw32/lib/watir/loader.rb:41:in `load_driver'
from d:/Ruby22/lib/ruby/gems/2.2.0/gems/watir-5.0.0-x86-mingw32/lib/watir/loader.rb:33:in `load_driver_for'
from d:/Ruby22/lib/ruby/gems/2.2.0/gems/watir-5.0.0-x86-mingw32/lib/watir/loader.rb:6:in `initialize'
from test.rb:4:in `new'
from test.rb:4:in `<main>'