皮皮学，免费搜题
登录
搜题
【判断题】
与性别决定有直接关系的染色体叫做性染色体。 ( )A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】直流电动机的调速方法以下说法正确的是
A.
调节电枢电压调速，属于无极平滑调速方法，调速范围宽
B.
电枢回路串电阻只能是有级调速，所串电阻上消耗电能，不经济
C.
弱磁升速，调速范围窄，一般与调压调速相配合使用
D.
自动控制的直流调速系统往往以变压调速为主
【单选题】听力原文：To Americans, between 'black' and 'white' there are no other races. Someone with one black and one white parent looks black. Which of the following is NOT true about average Americans?
A.
They think there is a distinction between those purely white and the rest.
B.
They do not think there is much difference between black and brown races.
C.
They think black people include only those of purely African origin.
D.
They do not think it is good for a white person to marry a black one.
【单选题】The United States is a country made up of many different races. Usually they are mixed together and cant be told from one another. But many of them still, talk about where their ancestors came from. I...
A.
reads at about 245 w. p. m.
B.
reads at 600 w. p. m.
C.
reads at about 300 w. p. m.
D.
cannot read difficult works in translation
【简答题】You will watch 2 clips from the film The Color of Friendship, first played on the Disney Channel in 2000. The story is about the friendship between 2 girls from different cultural and ethnic backgroun...
【单选题】What does the Indiana University study show?
A.
Interracial roommates are more likely to fall out.
B.
Few white students like sharing a room with a black peer.
C.
Roommates of different races just don't get along.
D.
Assigning students' lodging randomly is not a good policy.
相关题目：