皮皮学，免费搜题
登录
搜题
【单选题】
健康皮肤的表面是皮肤的角化层,由多层死亡和即将死亡的上皮细胞构成。角化层对上皮下组织( )。A.
特殊情况下有损害作用
B.
无作用
C.
具有保护作用
D.
具有损害作用
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】一台笼型三相异步电动机P N =75kW，U N =380V，n N =980r/min，λ m =2.15。采用变频调速，保持E 1 /f 1 恒定，若调速范围与上题相同，试计算频率为40Hz，30Hz时电动机的转速。
【单选题】What is exceptionally remarkable about child is that ______.
A.
he is born with the capacity to speak
B.
he has a brain more complex than an animal
C.
he owes his speech ability to good nursing
D.
he can produce his own sentences
【简答题】Type the appropriate tag question to fill in the blank. 1. Mark: Traffic’s really bad today, ___________? Ethan: Yeah, there are a lot of cars on the road right now. 2. Alex: Lily was wearing red shoe...
【单选题】He possesses a remarkable gift for music.
A.
ability
B.
capacity
C.
talent
D.
competence
【简答题】已知：某公司生产和销售A、B两种产品，A产品的单价为5元，B产品的单价为2．50元；A产品的贡献边际率为40％，B产品的贡献边际率为30％，全月固定成本72 000元。假定本月份A产品的预计销售量为30 000件，B产品为40 000件。 要求： (1)按综合贡献边际率法计算本月的综合保本额和A、B两种产品的保本量。 (2)计算企业的安全边际额和本月的预计利润。 (3)如果本月增加广告费9 700...
【单选题】Yesterday Emily was wearing the new dress __________ I gave her. The man ______ leg broke in a match used to be a football player
A.
which
B.
who
C.
whom
D.
why
【简答题】使用定语从句连接两个句子。 1. I have a friend. He likes listening to classical music. _____________________________________________ 2. Yesterday Emily was wearing the new dress. I gave it to her. _________________...
【单选题】He did the research in such a (remarkable) way that everyone says that he is really a man of creative mind选择能代替括号里的选项
A.
an outstanding
B.
an outstretched
C.
an uplifted
D.
an outspoken
相关题目：
参考解析：
知识点：
题目纠错 0
发布
