变换压路机前进、后退方向，应待滚轮停止后进行。可将换向离合器作制动用。
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Which of the following is a correct statement about how the user environment is configured at login?（）
A. If present, the settings in the $HOME/.profile file will override the settings in the /etc/profile file.
B. If both $HOME/.profile and $HOME/.env files are present, the settings in the $HOME/.profile file will take precedence.
C. The settings in the /etc/environment file are system-wide and will override user customized settings in the $HOME/.profile.
D. The settings in the /etc/profile file will override settings in the $HOME/.profile file unless the $LOCAL_PROFILE variable is set to 'true'.
地下防水工程施工期间，明挖法的基坑必须保持地下水位稳定在基底（）m以下。
A. 0.2
B. 0.5
C. 0.8
D. 1.0
小脑蚓部病变主要引起___________共济失调，小脑半球病变引起___________共济失调。
发明专利权期限自申请之日起20年，实用新型专利权权利期限自申请之日起10年。
A. 正确
B. 错误
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