冷滑试验就是在接触网受电的情况下,通过电力机车受电弓的滑行,对接触网进行的动态试验检查。
参考答案:错
用所给动词的适当形式填空。
1. He can help me (mend) the bike.
2. One of the children (fly) a kite now.
3. Let Li Lei (clean) the classroom.
4. It's six. It's time (read) English.
5. Look! they (eat) apples?
中毒型菌痢表现为()。
A.体温40℃以上、惊厥、休克、肠道症状轻或缺如
B.病程超过2个月未愈
C.不发热,腹泻每日数次
D.寒战、高热、里急后重明显、腹痛、腹泻
E.腹泻、贫血