三相异步电动机的转速取决于电源频率和极对数,而与转差率无关
参考答案:错
单词拼写(注意用正确形式填空)(每空1分,共10分)
小题1:Her music is very popular with ______(青少年).
小题2:We _______(逐渐)get used to getting up early in the morning and going to bed late at night.
小题3:Can you tell me the _________(用法)of the word “command”?
小题4:Tom told me that he couldn’t speak Chinese _______(流利).
小题5:The little boy is just starting to talk. He has a _______(词汇量) of about ten words.
小题6:We ______(遭受)from a terrible drought last summer.
小题7:Thunder often accompanies ________(闪电)
小题8:__________(基于)on facts, his article is popular with the readers.
小题9:She can speak _________(西班牙语) very fluently.
小题10:He said he won the prize but _________(实际上)he was lying.
男性,62岁。无痛性血尿1年余。X线腹部平片可见肾轮廓局限性外突。尿路造影见肾盏拉长、狭窄和受压变形,下组肾盏边缘不规则,并有不规则的充盈缺损。最可能的诊断是()
A.肾盂癌
B.肾结核
C.肾母细胞瘤
D.肾癌
E.肾错构瘤