振动压路机按激励方式可分为哪几种?
参考答案:
振动压路机按激励方式可分为垂直振动激励、水平振动激励、复合激励。
选择正确的单词补全句子。
1. Mary is my friend. She is a ____________ (boy, girl).
2. She has black hair and yellow face. She is from ____________ (Chinese, China).
3. What's his ____________ (name, names)?
4. She ____________ (like, likes) music.
神经衰弱的诊断要点,不正确的是()。
A.以脑功能衰弱为主要临床表现
B.精神易兴奋
C.脑力易疲劳
D.睡眠障碍
E.病程在1个月以上,除外其他疾病