400总吨及以上的船舶至少配备()公告牌,置于()。
参考答案:三块金属质;船员餐厅及两舷梯入口处
给水管网最常出现的问题是()。
A.变形
B.腐蚀
C.断裂
D.结垢
按要求完成下列句子
小题1:You should do your homework by yourself.(否定句)
You do your homework by yourself.
小题2:He has found nothing in the room .(改为一般疑问句)
He found in the room?
小题3:I’d like to show Tom the modle plane .( 变为同义句)
I’d like to the modle plane Tom.
小题4:She started learning English last year .(就划线部分提问)
she to learning English ?
小题5:She has got a notebook .(就划线部分提问)
she got.