皮皮学，免费搜题
登录
搜题
【多选题】
电器的作用有哪些?A.
根据外界的特定信号和控制的要求,手动或自动地接通或断开电路
B.
能够断续或连续的改变电路参数
C.
实现对电路或非电对象的控制,切换和保护
D.
实现对电路的变换,检测及调节
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
【单选题】Which of the following is TRUE about Cyanovirin?
A.
It is an active ingredient in a foam, cream or suppository.
B.
It is an active ingredient applied before sex to prevent HIV transmission.
C.
It is a protein that protects the body from infection by microorganisms.
D.
It is a drag used to prevent HIV transmission.
【单选题】滚动轴承转动套圈的配合(一般为内圈与转轴轴径的配合)应采用
A.
过盈量较大的配合,以保证内圈与轴径紧密结合,载荷越大,过盈量越大
B.
具有一般过盈量的配合,以防止套圈在载荷作用下松动,并防止轴承内部游隙消失,导致轴承发热磨损
C.
具有较小过盈量的配合,以便与轴承的安装拆卸
D.
具有间隙或过盈量很小的过渡配合,以保证套圈不致因过大的变形而影响工作精度
【单选题】Which of the following is TRUE about Cyanovifin?
A.
It is an active ingredient in a foam, cream or suppository.
B.
It is an active ingredient applied before sex to prevent HIV transmission.
C.
It is a protein that protects the body from infection by microorganisms.
D.
It is a drug used to prevent HIV transmission.
【单选题】Which ingredient is NOT used in the sandwich?
A.
salsa
B.
American cheese
C.
cucumber
【单选题】Which ingredient is responsible for being elastic in wheat flour?
A.
fiber
B.
husk
C.
bran
D.
gluten
【简答题】装配滚动轴承时，外圈与箱体孔的配合应采用________配合，内圈与轴的配合应采用________配合。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
